A cool and well-respected upperclassman, Akihiko is serious and determined, as well as cracking small jokes on small occasions. Of all members of the group, he is the most prone to sarcasm, one instance being if the protagonist talks to him while he and Junpei are taking a break from studying for first semester midterms, stating that Junpei isn't studying for his exams as Mitsuru told everyone to go back to their routines. He tends to show his excitement for a big challenge, something that eventually rubs off on Junpei. He is eager to train and fight, often to a fault. 

Akihiko also has an aggressive side, which he usually demonstrates when dealing with Shadows. He never gives up and always tries to get stronger in order to protect what is dear to him and feels guilty for not being able to save his sister, Miki, from the fire. As he puts it, he knows what it's like to feel powerless and he never wants to feel that way again, though this often results in him overworking himself due to feelings of self-doubt.