Etsu Kusuda

Etsu Kusuda is a pervy friend of Mamoru's. His talent is putting girls to sleep with stupid puns. He doesn't see much in Ayumi, but he is very interested in Misaki; he is nearly obsessed with her. He seems undaunted by Kei's good looks, and with his "Kappa" face, they tend to bicker a lot. He is also left-handed.

(Source: Wikipedia, edited)