, A mermaid x Songstress Siren ,

A Songstress Siren is known to be the most hypnotizing siren of the oceans, normally in pairs. Most when alone sing melodies to lure mermaids, sirens, fishes, and dolphins(Talking ones-).

Mermaids like Scara. Lurked around the kingdom told to never go into the enchanted coral dark reefs, which is where some mermaids have said that the Songstresses lurk around but most of them went extinct? Right?

of course, Scaramouhe was warned by Kazuha, Heizou, Sayu, Childe, and Lumine/Aether not to go. Even though Yae Miko dared him too, so he did.

Later, when swimming in the enchanted reefs he heard a lovely melody down the reefs where a ring entrance was found.

'Beautiful...' Follows the singing which lead him to... a songstress siren with mermaids, Xiao, Klee, Yoyamia, Ayaka, Mizuki, and Faruzan.