The first girl isn't Elio. Elio has also been referred to as a boy, and she is definitely not a boy. Her name is actually black swan, which we know from the description of the previous trailer she appeared in. The first myriad celestia trailer. As for the other girl, she is 100% Raiden. The long katana is a perfect match for the Herrscher of thunder katana but purple instead of red. Same color scheme as apho Mei as well. Plus she shares the same VA in both jp and cn with both honkai and genshin raidens as well, like all the other expys.
The first girl isn't Elio. Elio has also been referred to as a boy, and she is definitely not a boy. Her name is actually black swan, which we know from the description of the previous trailer she appeared in. The first myriad celestia trailer.
As for the other girl, she is 100% Raiden. The long katana is a perfect match for the Herrscher of thunder katana but purple instead of red. Same color scheme as apho Mei as well. Plus she shares the same VA in both jp and cn with both honkai and genshin raidens as well, like all the other expys.