Bachira has a rather eccentric demeanor and personality. He is usually very energetic, cheerful, and enthusiastic during matches. Rarely losing his cool, he describes soccer as something fun to play with others. Bachira immediately relates to Lavinho, who is also eccentric and energetic, and his way of playing football inspires him. He has a tendency to sleep in unexpected moments, such as when he was sleeping during the tag test. He mostly oversleeps and ends up relying on Isagi or Kuon to wake him up, and then falls asleep during their team meetings; he's also been known to fall asleep during meals. He also tends to show up completely naked after every training and soccer matches. When the Neo-Egoist League starts, Bachira takes his football training more seriously in an effort to become the world-class egoist he imagines himself to be and edge closer to becoming the best in the world. Bachira now actively weight trains and mediates. During his childhood, he was bullied because of his eccentric personality and exceptional skill in football, which made him terrified of being alone. This trauma causes Bachira to create an imaginary friend who is a "monster", more specifically a football monster, because it motivates Bachira and his plays in the game. Only after he comes to Blue Lock does Bachira start facing his trauma for he finds people he is similar to and can call friends, like Yoichi Isagi. Bachira can be seen casually befriending all sorts of people despite his somewhat strange demeanor, including Isagi, Rin, Chigiri, and Kunigami.Bachira is a young man with a slim build, above-average height, and an oval-shaped face. He has bright yellow eyes and mod-cut hair that reaches up to his chin and is black with golden under-lightsHe's schizophrenic, undiagnosed and unaware, and talks about seeing and hearing a "monster" that tells him what to do in matches.

Isagi is easygoing and has a generally friendly, cheery personality, but his simple and innocent habits often get on the nerves of the people around him. He tends to avoid any childish squabbles among other Blue Lock competitors and tries to be a peacekeeper between his friends and rivals. At the beginning of Blue Lock, Isagi is massively unsure of himself and his skill due to being the second-lowest-ranked player in Blue Lock initially and his conflicting ideas of football. As time goes on, Isagi develops a more assertive presence on and off the field, becoming the foundation for Team Z and garnering the respect of some of the best players in Blue Lock, who mostly have heavily assertive or dominant personalities.