It's a screwed up relationship but it fits the atmosphere of the series.

I wish Mika fell for someone that likes her for HER and not just because her head now resembles Celty's. I don't understand what Mika and Namie see in him. I would like Mika alot more if she loved someone better.

At ease! Ha ha ha ha ha ha ha!

don't care. I prefer shinra and celty's relationship better than this one

Honestly, I think it's disgusting.... They are both insane, and it's grossing me out.
They both need a hug, lol.
And they need to star accepting things for what they are.... Seiji needs to understand that as a human guy he can only date human girls (not Celty's poor head) and Mika needs to understand that Seiji sees her only as replacement for Celty's head and that she needs to move on....Like seriously

What ravissa said.
It's so messed up, that they actually fit each other. That's a 100% Durarara couple for sure! XD

Mika deserves someone that loves her for her. Not because she made herself look like Celty.