Hosaka Carina Tomo

is a «Sword Art Online» beta tester who sells information between players. Kirito often looks to her for her skills.

Background
Argo is first introduced as the beta tester who serves a middleman between Kirito and a prospect buyer of his «Anneal Blade +6». She was later revealed to have assisted players by creating a guide book for players. Inside are hunting locations and other resourceful information pertaining to staying alive in the game.

She is willing to sell any information except names of SAO beta testers. She also serves as a middle-man of player dealings.

Argo's whiskers were originally a mark written on her face when she tried to complete the quest that awards the "Martial Arts" extra skill. Unable to complete the quest, the mark remained on her face throughout the entire «SAO Closed Beta». She reapplies a similar makeup on the official server service.