*Najimi is known for having exceptional talent when it comes to communication. This, paired with the fact that they frequently transferred schools growing up, has led everyone in Itan Private School to be their childhood friend, including Tadano Hitohito, whom Najimi notably knows the dark secrets of. Najimi became the vice president of Class 1 because of its talent.

Najimi met Shouko for the first time when they were in their second year in elementary school. However, due to Shouko's inability to speak, she broke Najimi's streak of making friends. This caused Najimi to be bedridden for a week from shock.

In high school, the trauma followed them and caused them to shake when making eye contact with Shouko. Initially, Najimi rejected Hitohito's plea to befriend Shouko. However, after much begging, they reluctantly agreed. When walking home with Shouko and Hitohito, a former classmate confessed to Najimi and attempted to assault them when he was rejected. Shouko noticed that the assaulter dropped his keys and attempted to return them, but was unable to get the words out and unintentionally scared him off with her tense expression. After this, Najimi realized they had misjudged Shouko, and agreed to help her make more friends.*