I think Kaeya alluded to having seen Dainsleif before in Mondstadt, but it doesn't seem like they had talked to each other before, so it might not count as them already knowing each other? You could circle it on a technicality...
I thought about it a bit and almost circled that to get a bingo but I felt it was a stretch. "Already know each other" kinda imply they've talked. Perhaps in the biblical sense...
I think Kaeya alluded to having seen Dainsleif before in Mondstadt, but it doesn't seem like they had talked to each other before, so it might not count as them already knowing each other? You could circle it on a technicality...
I thought about it a bit and almost circled that to get a bingo but I felt it was a stretch. "Already know each other" kinda imply they've talked. Perhaps in the biblical sense...