Height: 170 cm Weight: 55 kg BWH: 90-60-89 Yuiko is Riki's classmate who has a self-sufficient personality. She is sometimes seen carrying a replica of a katana. She is seen as an older sister to everyone despite being the same age of almost the entire cast, and is referred to as Anego (姉御, "elder sister") by Haruka. She is fond of things or people she considers to be cute, such as several of the female cast of characters. She gets high grades in school and is especially gifted in mathematics. She was born outside of Japan, but is still entirely Japanese. She was given the birth name of Elizabeth which would often be shortened to Lizbeth as a nickname but does not share this as she prefers to be referred as Kurugaya. Despite her flawless image, she has difficulty of grasping emotions and has faked any she shows. Simply, she just doesn't understand emotions. Due to her being really smart, she has been a subject to bullying and is even scorned by her teachers. Kurugaya also hates being called by her real name, Yuiko or nicknames (Yui-chan), as she only wants her future husband to call her something like that.
Height: 183 cm Weight: 80 kg Birthday: 6th November Masato is a member of the Little Busters, and is Riki's roommate. He loves to work out and improve his muscle mass. His rival is Kengo Miyazawa, fellow member of the Little Busters. Masato is the most reliable and loyal of the Little Busters. He has a particular fondness for Riki, which he is more than willing to express out aloud. He's occasionally dubbed as "the lovable idiot". In the artificial world, he supports Kyousuke's plan to strengthen both Riki and Rin to overcome the events in the real world, though he is less reluctant to put the two through hardships. However, he will side with Kyousuke when it really matters (as seen in the baseball battle against Kengo and Riki). The repeating events of the semester and what lies ahead have always been clear to him, but he always acts as his true self, never faltering, or at least never letting it show. Kyousuke even had to go as far as force Masato through hallucinations in order to isolate Riki and Rin from him during their first difficult test in Refrain (since he wouldn't of had the heart to antagonize them otherwise). In the real world, he shielded Riki with his own body during the bus accident to save his life. (Source: littlebusters.wikia)
Height: 180 cm Weight: 72 kg Birthday: April 30 Kengo is a member of the Little Busters. He is skilled in the art of kendo and has a cynical personality, but his passion for the Little Busters is unmatched by anyone when he really opens up. He carries an air of honor and sophistication, complementing the physical prowess he evinces in being (self-allegedly) undefeated in 100 matches of kendo. On the other hand, he can be quite naive and childish. Just like the others, all he wants is to have fun. Still, he tends to wear a calm, mature facade, acting as a tsukkomi for the most part. He supports Kyousuke's plan to strengthen Rin and Riki in the artificial world at first, however, he changes over time. He insists that Riki and Rin stay in the artificial world forever, and that he'll protect them. He doesn't believe they can ever grow strong enough to accept the fate that awaits them in the real world. He challenges Kyousuke's methods on many occasions and even physically attacks him during the baseball battle after the latter "bends the rules" to ensure victory. In reality, Kengo just couldn't accept his supposed early death, especially since he spent so much of his youth practicing Kendo for his family's sake instead of playing even more with the Little Busters. He even pretends that his arm broke so he could spend more time with them in the artificial world. After being defeated by Riki and Rin during the second test in Refrain, he acknowledges their growth and his own weakness while in tears. He finally sees eye to eye with Kyousuke and the rest as his feelings are finally confronted. During the initial bus accident, Kengo saved Rin's life by shielding her with his own body. (Source: littlebusters.wikia)
Height: 166 cm Weight: 54 kg Birthday: January 17 Riki is the protagonist of Little Busters! He is a member of the Little Busters, and of them, he is seen as the only one that is straightforward and has common sense. His parents died when he was very young, and around the same time he was diagnosed with narcolepsy. However, he is the only one who is straightforward, acting with the most consideration and common sense among his peers. Riki is also seen as the most dependable and reliable member of the group, as he is always willing to support his friends through personal difficulties, helping them face their personal demons. MAJOR Spoiler The world Little Busters! takes place in is actually an artificial one made for Riki and Rin so that they may grow stronger; In the real world, most of the characters were in a bus accident and only Riki and Rin survive in the first world they encounter the accident in. Riki proceeds to grow stronger by going to the source of his narcolepsy and fix it. Afterwards, the bus accident happens again and Riki, now stronger than before, manages to save everyone with help from Rin.