I like this question. He's fairly content with them as individuals, despite their flaws/liabilities

I'd say he kind of sees Obsidian as being like the face of Iolite. Not exactly a leader, but he's been there for longer than most people other than Vincent, and Neji respects him, and he tends to be otherwise well respected. I wouldn't say a mascot either, because that doesn't sound active enough. I don't mean just like a speaker or whatever, and Neji wouldn't always trust him for that because he's not... always... the most rational. I guess he's like. The flag ship.

Kyouko is probably the person whose role he's the least sure of. Other than, kinda being a surly girl. Is that a role though? He doesn't have a problem with her, really, but she's the one with the least clear productive place in his mind.

Spitfire can handle the social stuff. AND HEY LOOK IT WORKED. They won the last game, didn't they? He does see Spitfire as a potential liability at times, though, because he's very emotional, and because Neji sees him as taking on more than he can handle, so that's something that needs to be balanced out.

Jaina is... quite... possibly the moral one. Or the straight forward one. Or something like that.

He kind of sees Inara and himself as filling a similar function in someways, in relation to the team, but doing it differently. Like, he sees both of them as the reasonable voices on the team, but in different ways, that actually might balance out. Inara tends to smooth things over, and be sensitive to people on the team's needs, helps them deal with emotions some, etc, whereas he... does not do that. He's more the critical side of being rational (in his point of view), and the one who has to look at things dispassionately.

Inara is also somewhat like Spitfire, in that she's socially fluent. In a safe way, where I don't use the word safe with irony quotes.

Vincent gets the be the team psycho. Which is a liability in some ways, but useful in others, and Neji realizes that. It's a harder balance than Spitfire in that way. He's smart, and socially fluent in a "safe" way, with irony quotes, and if less moral things have to be done, well, it can be handy to have someone like Vincent around. Neji does see some overlap with his own role and Vincent's that way too, to the extent that if amoral stuff has to be dealt with, it will probably fall to one of them. :|a

Reverse?