Taiga is a girl in Ryuuji's class. She has a well-regulated and beautiful appearance though is unable to stomach company from others. Due to her often snapping at others in brutal ways and her short stature, she is given the nickname "Palmtop Tiger." Her under-developed body and the added nickname has given her a complex which in turn serves to give her a negative attitude and facial expression. Essentially, Taiga gets upset easily and is considerably clumsy. She is also brutally honest, typically when she is lashing out at someone. Due to her cute looks (described as a doll by Ryuuji), she often gets confessions of love by boys, but she turns down every one of them, including Yuusaku Kitamura (which she later regrets). Despite coming from a well-to-do family, her life with them is very difficult because of various problems. Her father and mother got a divorce, leaving Taiga with her father. When he remarried another woman who was significantly younger than himself, it caused misunderstandings between Taiga and her step-mother. One day it became too much for Taiga, causing her to run away from home and since then, she has taken to living on her own. Since she came from a privileged household, she does not know how to do any domestic chores. When she meets Ryuuji and learns of his domestic talents, she ends up relying on Ryuuji to clean up after her. Aside from sleeping in her own house, and going to school, she spends most of her time at Ryuuji's house; so much so that she is considered a member of his family. At the beginning of the story, she is infatuated with Ryuuji's best friend Yuusaku Kitamura and gets nervous every time he appears around her. Ryuuji finds out due to a misplaced empty love letter from Taiga meant for Kitamura. Ryuuji then admits to having feelings for Taiga's best friend Minori. Due to this, Taiga and Ryuuji team up to help each other get into a relationship with each other's best friend.

When Sasuke was young, his clan was murdered by his older brother, Itachi. With his parents and family now gone, his brother spared him and left him to survive by himself. He told Sasuke to hate him. Sasuke tried to forget about the past by applying himself in the ninja academy and fitting in with the rest of the leaf village. After his fight with Naruto, he believes he's been wasting his time "playing ninja" with the people of the leaf village. His new goal is to get stronger so he can avenge his clan by killing Itachi and then restore the Uchiha clan. As a wielder of the Sharingan (the kekkei genkai of the Uchiha clan), he learns to use Chidori and has a vast knowledge of the various Fire Jutsus. The curse seal which Orichimaru gives him during the Chuunin exam, at first, enhanced his power but at the risk of killing him. Now he can use it of his own free will. Claiming at first that he doesn't need any friends, he is forced to contradict himself when he sees that either Naruto or Sakura are in danger. Remembering this type of Sasuke is what brings motivation to Naruto. Sasuke openly admitted to Naruto that he was his closest friend. Appearance Sasuke has black hair with a blue tint that lengthens as the story goes with onyx eyes and has lighter skin than his brother Itachi. Like many other members of his clan, his hair hangs over both sides of his face to roughly his cheeks. In his curse seal form, he has grey skin with wings on his back that resemble giant webbed hands. He also has hair similar to Madara Uchiha except in a greyish-blue color. At the beginning of Part I, Sasuke's clothing made up a blue, short-sleeved shirt with a raised collar and the Uchiha crest on the back and white shorts. An interesting thing is that during Part I the Uchiha symbol on his back gets smaller each time he changes his outfit. In the last stage of the Chunin exams, he wore a black, one pieced version of this outfit but eventually went back to his original clothes. In Part II, Sasuke has grown noticeably taller (almost eye height with Itachi) and slightly more muscular. wears a white long sleeved shirt that's open at the torso with a smaller version of the Uchiha crest on his collar. He wears black pants with a blue cloth hanging from his half way up his stomach to his knees. He also wears a purple rope belt (Japanese name: Shimenawa) tied in a bow fashion found on many Sound ninja, only the bow is in a different style and is tied in the front instead of the back. He also will at points remove his shirt and hang it from his belt around his waist to give his wings in Curse Seal Level 2 room to move (also without transforming).