Yukio

Eiichi is absolutely in love with Yukio, to the point of refusing to see any faults with him. He tries his best to constantly impress him, which is often met with being ignored, which only ignites his heart even more. He loves being teased by Yukio, even to the point that seems like bullying. He's blissfully unaware of Yukio really being a demon, stating that 'he'd know if that was the case.'

Nozomu

Despite the amount of time they have to spend together, Eiichi despises Nozomu. He believes Nozomu is a stuck up, pretentious dick who thinks he's better than everyone. He also has the false belief Nozomu is the only thing in the way of he and Yukio falling in love and dating. He does not quite understand how one-sided his hatred is.

Issei

Eiichi only sees Issei when he comes to visit the band when they're at Tiger Lily Records. He hasn't had a conversation with him, but he at least thinks he's better than Nozomu.