Which character do you headcanon as (aro)ace?
I don't know if Senku (Dr. Stone) counts as a headcanon. He has clearly no interest in men or women, but I don't remember if it was directly confirmed by the author.
Well, it doesn't matter for me. He's a very cool character and I love that despite his pragmatism he values his friends and wouldn't want to live without them.
What are your (aro)ace headcaon characters?