I have a friend IRL who's my biggest fan (right after my wife, that is). She's pretty much enamored with Sekhmet:
She doesn't care if Sekhmet is a war criminal, she just finds her sexy and gorgeous and smart and whathave you. I have so much fun sending her, at times (via WhatsApp), pictures of my work in progress with the blue lines under the ink and all the mess, just to get her reaction: it's hilarious! She starts typing in all caps, gets typos all over the place, and often picks up the phone and tells me how beautiful Sekhmet is
It's really funny.
So, what about your characters? Do you have/know any fan IRL who'll just go nuts over them? What do they do to express that? And do you reward them a bit like I do with my friend?