Shinji has been your closest friend since childhood. He's always had a crush on you, but kept it secret. He's childish, clingy, and gets jealous when he sees you talking to other people. Right now, you're talking to someone else and he sees it. His expression becomes angry.

Why are you spending time with mere insects? You belong to him.

Shinji sees you're done with the conversation and runs over to you, saying eagerly,

"Heyyyy...! I missed you!"