It's different. Remilia is Warugaki's self insert. I still didn't see hints that Imizu uses Remilia like this. It can be that the guy simply draws Remilia a lot (like sonson, or Karaagetarou)
AxiamWolfe said: Strangely enough, both their Remilias have somewhat pointier hats. I was wondering where I'd seen this Remilia hat before and then I remembered sk-II.
I think the pointy hat design is inspired from Asai Genji's Remilia in CoLA.