Eons ago in 2020 (?), Fubuki and Marine featured there yes. Not sure if there was a stream. Kiara, Botan, Moona and Ame are new and they haven't streamed it. Basically their avatars are available as captains in game with voice lines.Also Hololive is having a crossover with World of Warships, but i cannot for the life of me remember this even being announced, or any of the girls playing it.
I remember Pippa playing WoW. I remember a few others. But not any Holomems. Am i losing it? Is this old?
Collab was leaked in 2022 but postponed until now.