These Korean voice actors sound familier...

So turns out quite a few VAs from the Korean side share voice roles with characters in Library of Ruina. And these are only the ones I know. Xiangling, Barbara, & Gloria: Yun A-yeong (윤아영) Hu Tao & Hod: Kim Ha-ru (김하루) Noelle, Keqing, & Eileen: Lee Bo-hee (이보희) Rosaria & Binah: Kim Bo-na (김보나) Venti & Gebura: Jung Yoo-jung (정유정)