Nagito

I started to write a fanfic about Urashiki being non-romantically fascinated about Momoshiki and it's a really great thing to write about. He is friends with Momoshiki and he thinks Momo is the most beautiful creature in the whole universe. And there's nothing romantic in it. Urashiki just looks on Momoshiki and thinks: 'aw, Momo-chan* is so beautiful'. Urashiki doesn't want to kiss Momoshiki. Ura just want to spend time with and look at Momo.

*in the anime, Urashiki was addressing Momoshiki as 'Momo-chan' when he wasn't around and I find it a cute thing to add in the story in non-romantic or sarcastic way.