Fascinating. They seem to actually have someone who can see possible futures. That's completely bizarre. He manages to get a glimpse of her, hiding on the roof and peering over the edge. He's only a little surprised it's a woman, but the obvious foreign-ness of her features and her short haircut are much more startling. Maybe it makes sense, though, if anyone ever managed to develop future sight it sure wasn't here, not unless it was all within the past thirteen years. What's she doing here, though?
If this keeps up he definitely won't be able to do anything about the Mo family until the Lans are all gone. Which is fine, honestly, when has a Lan ever done anything except cramp his style.
Aside from all those times Lan Zhan totally did things other than cramp his style ANYWAY. Humiliating the Mos in front of their cultivator guests was his best plan for revenge for Mo Xuanyu that didn't involve killing them. Not that killing them would be hard, but that doesn't mean he wants to do it. He's going to have to try to think of something else and sooner rather than later.
He settles in to watch over the baby Lans and make sure they don't get in over their heads. Just in case.