I’m picking Hoozuki no Reitetsu since I just watched it a while ago and it’s more fresh in mind then Cuticle Tantei Inaba (that and it’s hard to pick just one character to like in Cuticle Tantei Inaba !!)
My favorite character is Hakutaku since he’s a loser and I love losers.
With that said my other favorites would be Karauri and Nasubi followed by Hoozuki. Honorable mention goes to Peach Maki.