The following is a list of characters from the manga series Change 123.
Main characters
The protagonist of the series, Motoko was adopted by three combat specialists after the death of her mother. Her "fathers" trained her in karate, swordsmanship, submission techniques, close quarters combat and the handling of firearms. As a result of the excessive physical and mental strain placed on young Motoko during her training, she developed three split-personalities, collectively known as "HiFuMi", as well as one called "Zero", who represents all her pent up rage. HiFuMi works to protect Motoko, and though she sees HiFuMi as a burden to her, wishing only to live a normal life, she knows they are just trying to look after her safety. Though Motoko could be a powerful combatant even without HiFuMi, her shy and passive nature often restricts her from making use of her fighting capacity. Though normal characters do not notice when she changes personalities, the subtle changes in Motoko's "Ki" occurs whenever a different personality takes control, which could be perceived by other sufficiently-skilled fighters. MRI scans done by Kannami have confirmed that Motoko's muscle structure is indeed very impressive. Though initially wary, Motoko develops feelings for Kosukegawa and eventually starts dating him. One of her fathers unknowingly arranges for her to be married to Kosukegawa, but she turns the offer down as she wishes to fuse with Zero and HiFuMi before even considering marriage. Later, it is revealed that Motoko may not be the original personality, but merely a "host" personality, implying that the real Motoko might actually be Zero. The identity known as "Motoko" may have been constructed in order to handle everyday life while perceiving herself to be the true identity. At the end of the series, however, she is able to fuse with HiFuMi and return to a normal life with Kosukegawa. They later get married and in a final twist of fate have three daughters, who look like Hibiki, Fujiko and Mikiri. HiFuMi "Hibiki", "Fujiko", and "Mikiri" (literally meaning "1 - 2 - 3") is a representation of Motoko's three personalities. They appear whenever Motoko experiences strong emotions, is in danger, or faints. In some cases, HiFuMi is capable of emerging simply when one of the personalities wants to get out. The three personalities are in constant communication with each other, but cannot communicate with Motoko. To solve this Motoko keeps a diary in which they can all write feelings and suggestions so Motoko can gain a better understanding of each personality and vice versa. The three of them are essentially representations of Motoko's "fathers". Each with their own specialty and characteristics. It is explained that each has their own physical characteristics set apart from the rest because of variant changes in muscle tones in the face and bodies they look similar, but not the same. Each physically represent a different physical build due to the unique training of each style. To further tell them apart each has a different hair style pertaining to them, as well as they seemed to be different hair colors, though it is not explained how that happens. They each develop their own unique a bond with Teruharu Kosukegawa. currently, because of Motoko's disappearance after remembering how her mother died, HiFuMi have taken up the duty of being Motoko while at school. However, in Volume 11 after they challenge both Hino and Ginga to an all out battle of 3 against 2, HiFuMi easily wins. They are shortly afterward caught by Kosukegawa and a teacher. Kosukegawa quickly thinks up an excuse for their fighting and apologizes on their behalf. Believing that they have caused Kosukegawa more than enough trouble, they decide to leave, possibly taking their Grandmother's offer, though states she would return soon. is an aggressive tomboy who is particularly skilled in karate and is represented by Red (attack). Her hair flows freely and equal and she is always looking for or instigating fights. Through her father's training she has always been known to take a head-on approach with anything, be it training (instead of dodging a log booby trap she instead chooses to punch through it), getting Kosukegawa to admit his feelings to Motoko (by kissing him and changing into her so he would finally kiss her), and even with her own feelings (as she kisses Kosukegawa for his birthday present, then stated she would give him something more for his next birthday), even fused with Zero she doesn't dodge attacks. Hibiki has deep feelings of love for Kosukegawa and admires how he is able to step forward though his fear when he must. To which she used as inspiration to give her 100% and conquer her own fears during a deadly battle. It is common for her to 'apologize' to Kosukegawa with a kiss or by offering herself to him. She finds the idea of being married, having a family and always being with Kosukegawa to be like a dream. She even goes so far as to even call him "darling". Hibiki is also shown of trying to encourage a sexual relationship with Kosukegawa. Be it giving hints of giving him "something more" for his next birthday or hoping he would jump on Mokoto after she comforted him. She even confirmed that she was planning to have sex with Kosukegawa for his birthday, but refrained from it since Motoko was anxious enough to faint from "only a kiss". Hibiki even shows jealousy when Kosukegawa is with Ginga or Izuru, to which she describes herself as though feeling her "head spinning" and her "heart pounding" whenever she sees him with them. Once after she lost a fight to Ginga in front of Kosukegawa she was so embarrassed to show her face to him that she didn't reveal herself for two months. Out of the three personalities, she is the most common to appear. She has the ability to 'stay out' from morning to night since she is the one most eager to jump into a fight. Hibiki is the first to kiss Kosukegawa and second to receive a date with him. When Hibiki witnessed Sora throwing Kosukegawa's cherished collection of Kamen Raider videos away, a ploy by Sora to have HiFuMi reveal the power of "black", she was overcome with rage. This triggers her first merger with Zero, and as a result of this merger she nearly kills Sora before Kosukegawa eventually intervened. In fact he was also nearly killed, when Hibki attempting to strangle him with the scarf HiFuMi and Motoko made for him for his birthday. It was only after realizing that she was not protecting Kosukegawa from crying, but was in fact the one making him cry, that Hibiki was finally able to take control over Zero. After the disappearance of Motoko, true to her head-on approach tries to bring her back by having a no holds brawl against Hino and Ginga. However, after defeating them realized even their level of fighting wasn't enough. is calm — almost to the point of appearing cold-blooded — and proficient in the use of weapons and represented by Blue (speed); indeed, she is the quickest of the four personalities, outside Zero herself. She is also the most mature and adult-like of the three personalities; hence, she is also the most analytical, almost to the point of being strategic. She doesn't seem to care for food that isn't nutritious in any way, but now has a liking for ice-cream because of Kosukegawa. Because of her marksman skills, she is a natural at video games, but tends to use a lot of ammo in shooting games as she was trained to shoot the head and the heart. She is shown to be stronger than Hibiki, whereas Hibiki lost to Ginga, Fujiko easily defeats Hino, who is the current Gadam, and therefore much stronger than Ginga. Though she states to Hino that she doesn't believe she is in love with Kouskegawa, she admits that she is fond of him, and that he is a very dear person to her. Some of her actions however point to Fujiko having very deep feelings for Kosukegawa. For example when she first meets Hino, she challenges her to see if she is strong enough to protect him. Also after seeing Kosukegawa stabbed and apparently mortally wounded by an American soldier, Fujiko was so enraged by the thought of losing him that she willfully fuses with Zero in order to avenge him and nearly kills the soldier by systematically shooting him in painful and non-lethal spots in order to prolong his pain before she kills him. But before she finishes him off she realizes that she truly does not wish to go against Kosukegawa's way of life. She manages to restrain Zero and spare the soldiers life as she clutches her precious blue topaz necklace Kosukegawa gave to her for her birthday. However moments later she learns that Kosukegawa's 'blood' was actually from a bottled vegetable drink that protected him from actually being harmed. She became very embarrassed to have gone so far over "spilt juice" and revealing so much of her feelings, which she usually keeps guarded. She is talented in homemaking skills, as she is a good cook to the point of near-perfection. Hibiki and Mikiri comically state she once melted a pot while preparing curry over the course of three days when only one night was required. As well, Hibiki stated that on the scarf they all made for Kouskegawa that the "professional" looking parts were done by Fujiko. Also, after Motoko's disappearance, both Mikiri and Hibiki have her do all the house work, for which they were chided by Kosukegawa. After controlling zero we learn what she truly wishes for is a life of her own. is the child-like expert in grappling and submission moves and represented by Yellow (defense). All Mikiri wants is to play like other children, although like a child, she can easily be scared into fainting and possesses child-like cruelty, showing excitement at the prospect of scratching and clawing a man's eyes out. A constant gag with Mikiri is that when she takes control, her body form changes (described by Motoko as a change in her muscle placement), inevitably increasing her bust size and causing anything less than a shirt (bra, bikini, etc.) to rip apart. She has a very large appetite, able to eat all 31 flavors of ice cream in a single sitting. Of the three personalities, she appears least often but, has the most active social life. 'Playing' with the neighborhood kids visiting "Granny". Has more of a child-like attraction towards Kosukegawa. Calling him Kosuke-niichan. Stating that she would miss playing with him if he was killed and wanted to take a bath with him on his birthday, upset at the fact that he fell asleep before she came out. When she was comforting Kosukegawa stating "You should always be who you are because that's why we (HiFuMi) love you so much". Mikiri would often visit an elderly neighbor of Motoko's whom she referred to as Granny, as the elderly woman would often make her ohagi to eat (an amount Motoko herself couldn't stomach). In chapter 41 Granny died, leaving one last batch of ohagi that Mikiri vowed to finish. When this batch of ohagi was dropped and ruined by would-be muggers, an enraged Mikiri fused with Zero to exact revenge, only to be brought back to her senses by the fact that she would have crushed Granny's ohagi if she had continued fighting. However, true to her child-like nature, Mikiri, joined by Kosukegawa, ate the ohagi off of the street, forcing the muggers to do the same.