He appears to have multiple roles. As Krishna of the Pipes he was in the center of a pretty fabulous party in Jabon, and could be found by following the party gradient to its center. But once the plan is announced, Krishna declares that they do not need Krishna of the Pipes - it is time for Krishna of the Blades. He draws a pair of swords, and all of the party guests scream and starts to flee. The party mood seems over.
In Tripartite III he helped us rescue Gi Su from Kali to repay a debt.