Rantaro Amami

 THIS CONTAINS SPOILERS FOR BREAKING KRYS 1 

Appearance
Rantaro is good-looking, and it is noted in the game that his looks resemble those of a stereotypical "playboy."

He has curly hair the color of green tea, which he keeps relatively short, a small patch at the base of his head completely shaved, with two short ahoges sprouting from the top of his head. He has a few longer clumps of hair hanging down in front of his left ear and between his eyes, and long bangs that cover the majority of his forehead, side-swept so as not to impair his vision. His eyes are green, and they slope downwards towards the sides of his face, both framed by notably long, thick eyelashes.

He wears a dark blue striped sweater with wide, elbow-length sleeves, a small chain accessory pinned on just beside his right shoulder. Underneath this, he wears a darker shirt that pokes out from below the hem of his sweater and from above its low-dip collar, still leaving his collarbone exposed, and another white garment that hangs out of the bottom. He also wears baggy, light-brown sarouel pants, and navy-blue slip-on shoes with white soles. On his sweater there's the crest of his former high school, Hope's Pass High School, as well as a larger symbol, a ship's steering wheel, which also bears some resemblance to the setting sun, which covers most of the lower half of his sweater, centered to the left.

Rantaro wears a necklace with a rectangular crystal pendulum hanging at the end of it, a silver bracelet on his right wrist and a different, larger, dark brown bracelet on his left that wraps around his wrist several times. He has multiple silver rings: one on his left index finger, one on his right thumb, and one on his right index finger, and on his right middle finger he wears one longer and darker ring. His right ear has five ringed cartilage piercings, and he wears a small beaded earring in the lobe of each ear. His official design sketches show him with a silver piercing on his right eyebrow, however this is not included in any of his game sprites.

Personality
When he was first introduced, Rantaro seemed like a mysterious individual. Later it could be seen that he is a carefree and relaxed person, and he is actually described as one of the more ordinary students despite his mysteriousness, with he himself stating that he can sometimes get a bit overwhelmed by the others' stranger personalities. Nevertheless, he is shown to have more patience than others with some eccentric students like Kokichi Oma and Miu Iruma, having a tendency to just laugh off some of the potentially hurtful things they say. Even though Rantaro cannot remember his talent, he doesn't seem worried about it, instead, he simply says he just looks forward to finding out what it is. He is usually seen smiling and describes himself as "not a suspicious guy", and he gives off a really calm and composed vibe, making him seem like a pretty reliable person. His speech is characterized by being very friendly and colloquial, using the "～っす/-ssu" copula in his sentence (in the Japanese release only). Fan translations usually adapt this pattern by using teenage slang in his lines.

Despite his appearance and manner of speech, he has cold, excellent insight, and is both determined and brave. He even has downright frightening expressions whenever he gets very serious. While the other students descend into confusion and chaos when Monokuma and the Monokuma Kubs state their objective, he is capable of coldly interrogating them about their motives. He also shows a deep understanding of the situation and often talks and acts like he knows something the others don't know, saying profound-sounding and enigmatic sentences, which often make him sound quite suspicious or even eerie. He is shown to be very competent in the Killing Game scenario, understanding that in order to truly win the game you must end the game itself instead of outwitting other participants, and he warns Kaede about her inspirational speeches and strong cooperation with others, because it makes her a notable threat in the eyes of the mastermind. During his Free Time Events with Kaede, she notices that he calmly observes other students and makes logical assumptions about them. He plans to end the Killing Game, telling the others not to intervene.

People (especially girls) occasionally seem to assume that Rantaro is a womanizer, he himself is aware that he looks like a "playboy", but he always insists he isn't that kind of person and he doesn't have a girlfriend, stating that he's just a chill, friendly guy. Apparently, he dislikes it when people assume that he is a womanizer or the kind of person to quickly hook up with someone based on his looks, possibly because his father might be one. During the cutscene with him, Kaede and Tsumugi in Chapter 1, the two girls talk about how his looks give the impression of a playboy while he really isn't that kind of person at all, though in the English version Tsumugi also seems to assume that he might be gay considering his insistence on not having a girlfriend and his somewhat stereotypical mannerisms. Since Kaede still keeps assuming that his nail art skills are related to a possible girlfriend, he admits it's always been "for family, nothing romantic". Furthermore, he appears a bit awkward whenever other people flirt with him or assume that he is flirting with them, sweating slightly and putting his hand behind his head while smiling awkwardly. Kaede especially tends to assume he is flirting with her, but he always tells her it's nothing like that.

Rantaro also looks similarly awkward when he thinks Shuichi wants to ask him out in the bonus mode, Love Across the Universe, and he takes a moment to realize what Shuichi might mean by "taking their clothes off". He appears slightly uncomfortable but answers seriously that he is flattered but Shuichi can't ask him out of blue like that, and while looking a bit offended and sighing with slight annoyance, he states he is not that kind of guy, and that Shuichi would have better luck with someone else. If Shuichi suggests reading dirty books with Rantaro, he seems to find it quite amusing and advises him in a somewhat big-brotherly manner to do it in his private time, assuring him that he won't tell anyone. When Shuichi talks about not wanting to leave him alone during his Free Time Events, Rantaro is surprised and then blushes awkwardly and tells him he can't be serious and that he's not sure how to respond to a guy saying that. This along with his Love Suite scene, which portrays his ideal relationship as one that mirrors his relationship with his younger siblings, seem to imply that he has little interest in romance and sex, or at the very least does not consider it a big priority, and dislikes casual hook-ups.

Instead, due to of having multiple little sisters, he acts like a responsible big brother towards some of his classmates. He has great knowledge of concepts that are considered feminine because he used to help his younger sisters with certain things like schoolwork and nail art. However, Rantaro considers himself a terrible brother after an accident in the past, even calling himself the "Ultimate Useless Older Brother". The possibility of his sisters hating him and their safety in general appears to be his biggest concern, and even though he is seemingly a relaxed person, he is actually very stressed during the Killing Game, because he is very worried about his sisters and feels that he needs to get out fast in order to get back to them. He tends to smile constantly even if he's actually feeling bad on the inside, which is supposedly a habit he developed due to having so many younger siblings to take care of. Very few times, when he gets a feeling that his sisters might accept him, he can have a real smile and laugh. His biggest dream is to reunite his sisters and obtain their acceptance, and he is extremely dedicated to this dream, to the point that he once joked that he may have some sort of sister complex. In his Love Suite scene, his fantasy shows his ideal situation in which he wishes to stop being a teacher for his younger sibling because he claims it's too dangerous for them to be involved with him any longer, and he wishes to spare them from all the details, by which he's likely referring to the Killing Game. He even mentions himself dying, though he claims it's just a joke. However, his younger sibling wishes to support him despite the risk and convinces him to tell them about it, which makes Rantaro genuinely happy and feel peace. In the bonus mode, with Shuichi's support, he believes he'll become a real Ultimate Big Brother some day.

Rantaro is shown to be a bit unsure of himself. A lot of this anxiety is related the stress caused by his sisters' situation, but he is also shown to be a bit insecure about his memory issues, assuming that others wouldn't trust someone like him and wondering if he can even trust himself. His unsure nature is also seen in the way he often laughs in a laid-back manner and states that he's just guessing after explaining some of his reasoning. Furthermore, he appears surprised whenever someone is really nice to him, as he blushes and states that it's such a sweet thing to do, clearly not assuming other people would treat him like that. Whenever he is in the bad mood, he tends to sigh in slight annoyance and won't hesitate to openly state out loud that he doesn't want to talk. It's also been shown that, despite his rather chill demeanor, he possesses a no-nonsense attitude towards very immature and childish behavior, at least when it comes from people of his own age. During Love Across the Universe, if Shuichi suggests childish activities such as shouting inside the library or playing with certain objects for no apparent reason, he often responses with slight annoyance and awkwardness, once even telling Shuichi to be an adult. He also feels a bit embarrassed to do things like baking or dancing with him.

As a big character trait, Rantaro has had the nature of an adventurer since a young age, as he apparently had a tendency to go on small adventures all by himself. He has also stated that he likes to travel, and has done plenty of times, having been to some reasonably dangerous areas as well as popular tourist destinations. He claims he admires travelers and loves to visit new places and meet new people, and would love to do that his whole life. However, he has stated that he does not like to use the term "traveler" of himself, as it's a bit "too romantic" for him.

Backstory
Rantaro claimed he came from a very rich family and that he was raised like a celebrity, and that he has multiple younger sisters, most of them stepsisters.

Many years ago, he and his entire family went on a boating trip. It was Rantaro's first one. He liked traveling, and once they reached a port, he got off the ship and went on an adventure. His youngest sister followed him off the boat without him realizing and as a result, she disappeared and was never found. Rantaro blamed himself for her disappearance, believing himself to be a terrible older brother and starting to fear that his sisters might hate him.

However, Rantaro was determined to find his sister, and, with his father's permission, he traveled around the world on a boat searching for her, whilst simultaneously helping with his father's business in search of new markets. He firmly believed that his sister was alive unless he was proven otherwise. The traveling was dangerous, especially when he had to cross territories. He gained his Ultimate Adventurer title during one of his journeys through the savanna when he came across a remote village and helped the villager with their research about a rare disease that only affected the people there. He began to get famous after that, traveling the world, and eventually, people were calling him the Ultimate Adventurer.

Somehow, Rantaro lost all twelve of sisters all around the world, and everyone, including his family, told him to just give up on his search. Despite this, he was still determined to reunite with his siblings, no matter how many years it would take him.