So admittedly I haven't introduced any character OUTSIDE of him yet, but he still holds a very special place in my heart and he's personal to me 
This is Saturn! He's the protagonist of my prequel comic, and is one of my favorite characters of all time in general, because he was actually the first character I ever "created". When I was 8 I loved playing with lego bricks, and managed to make a little abomination that eventually evolved into this guy years later, and when I was little, I viewed him as a little source of comfort, like a kid who loves dolls.