While I'm doing character summaries for those too lazy to just google the little buggers...
Kirito: The protagonist of SAO, Kirito cheerfully abandoned the panicked playerbase when the death-game nature of SAO was revealed. Arguably understandable, if not justified; those circumstances would've been terrifying for just about anyone and a lot of people would rather flee than deal with thousands of frightening, terrified, rioting players.
Over the next few weeks, he'd use the knowledge gained from the beta test to hunt rare mobs, quests with long cooldown times and great rewards, etc.
For these practices and abandoning the playerbase in general, players like Kirito would later gain the dubious title of "Beaters", a fusion of "beta tester" and "cheater". Kirito willingly accepted this title in order to try to save most other beta testers from persecution and hatred.
I forget which order they came in, but:
He later broke several of the swords in Lisbeth's shop (in one hit because REASONS) and subsequently took her with him to a higher-level area so she could get the materials to make him better ones.
She joined his harem in the process. He was oblivious.
When Silica was about to be murdered, he killed the mobs surrounding her and rescued her—according to his claims, not because she was in danger but because she reminded him of his sister. (Cousin, technically. Did I mention said cousin joins his harem?)
Anyway, he gave her a bunch of new gear and escorted her through a higher-level area so she could revive her familiar/pet/dragon. At the end of this area, Kirito faced off against a group of PKers and let them attack him; apparently, his HP regen was larger than their combined DPS. Because HURRRR, or "my numbers are bigger than yours."
Silica joined his harem in the process. He is oblivious.
Skip ahead about two years and Kirito is the only real player with a Unique Skill, Dual Blades. In theory, duel-wielding swords should "just" double his DPS, right?
In practice, between it and his other skills, he basically turned into a dungeon boss. See also "my numbers are larger than yours" for the memetic mutation of this silliness.
Additionally, he hid this ability and almost let people get killed just so he could hide it. Of course, he arrived in the nick of time (TM) and saved everyone.
TL;DR: Kirito is probably going to be beneath our notice or just another player in this quest. His black-hole-ness was due to PLOT and had no real grounding in personality or other real reasons. I believe he's unlikely to do the same in this.
We can safely ignore him.