I have to say Scarlet Man is absolutely my favourite! I love when he turns up in person, and his habit of jumping off things and floating off when people aren't looking continues to amuse me.
Beyond that, I quite like Lily and Lukas.
I'm not entirely sure why Lily. I think I feel like she has a warm heart but takes a while to warm up to people. Sometimes I feel like there are glimpses of affection in her gruffness.