User blog comment:KamiOfWind/Revision plans/@comment-3250527-20150903050902/@comment-24629512-20150903213728

Actually, I saw something of interest as to why she could be in towns, two actually. The first is that in the Silica episode, Rosalia (or whoever) said that Kirito would be orange for hurting her. But Kirito said that being orange for a few days wouldn't affect a solo player like him. Also, in another episode a laughing coffin member was in a town.

Kati hunts down Game clearers, and since those are high level targets, the implied cooldown to become green again would probably pass before she gained another victim.