Lemme see if I can explain the process I have for creating characters:
1) I see something I like, such as a big Samoan dude with long, wavy hair, and then I think to myself, "I should have a Saoman in Kumi. Some kind of Polynesian-ish character."
The seedling idea has been planted in my head.
2) Then I think of who this person is in relation to the story. "He could be Jahari's love interest, which is how Kumi finds out his best friend isn't into the ladies. And how Kumi realizes Jahari has a type, namely big, strong handsome guys like him. Kumi is both amused and slightly insulted by this discovery."
3) Then I create a backstory so it doesn't seem obvious that I just plopped a character in for my own amusement. "Okay, so...maybe this Polynesian dude's people can commune with Watchers? And that's why Kumi and Jahari find them? No. No--Healers! They're Healers, and Kumi insists he and Jahari find them so Jahari can master his magical abilities and then Kumi becomes slightly jealous when Jahari spends so much time with Polynesian Dude and wonders if Jahari doesn't think Kumi's cool anymore and then he sees them kiss or something later and is all 'Oh.'"
4) Then I set about drawing the character, using references
without paying attention to anatomy. "What the hell...? He looks like an older Sokka."
5) Then I realize I've drawn him too small and a little too pretty and feel sad."Polynesian Dude looks like he's Kumi's size. And I'm too lazy to redraw him. Fudge, I'll make another picture of him and Jahari and Kumi later."
6) Then I realize for this entire time I've been calling him "Polynesian Dude" and he probably needs a name. "Ooh, 'Hahona' means 'Healer' in Maori! Sweet!"