Assuming they still live, yes. I thought Hansa to be likely, though did not have the time to get to Laine prior to his death... if Hua Cheng was being truthful about belonging to a different team and it was not Laine, then that narrows it down to one. Another I am working with already planned to exchange their affiliation with Hansa, so they will be confirming for me; I trust their word well enough.

[he was more comfortable sharing with another immortal first, naturally, and if he can find out while sharing with as few people as possible... well. of course he's doing that.]