Senku, Gen and Byakuya from boys, Kohaku from girls
Senku has a heart in right place, is a walking computer in matter of knowledge and math, has even a clock function I suppose and the funny scenes are always the best, when he's part of them, he's so cheeky and calculative, he's a char' that is hard to hate :)
Gen is a two face, at first I couldn't decide, what to think of him, but he slowly grew on me. He's mysterious, smart, often bringing up interesting ideas, the design of his character is original and that evil face sometimes, well, he can be scary if he wants, admirable. He's one of my fav' characters, who's undergone change of character during series - if evil guys start to do good for change, it's nearly automatic like for me wahah.. I can't trust in his maliciousness anymore, hopefully it stays like that
Byakuya is such a sweatie, always so optimistic, cheerful, yet hardworking and dependable, how it should be for a father figure. I was very touched by his actions and presents made for Senku and following generations. Really, such a strong figure.
Kohaku is a strong willed person, loayal to her believs, caring when necessary and really a cool fighter. She can decide on her own, what she wants to do or who to believe or follow, I think she has some potential being a fighting commander in the future for the tribe. Being bashful is rare for her, but it's worth it, when this side of her is actually shown