[Divino]

Originally Posted by 7Th

Spoiler:

They are non-human siblings; Shaina literally says "the meteor exploded and its Cosmo created two lives: Kouga and Aria". I think that counts as twins.

Spoiler for n:

I have to hear a "oniichan" from Aria or "Imotou" from Kouga in order to be 100% sure Lol
Other terms can be: "You two are brother and sister" "You two are twins" "You are related"
I heard none of that in this episode other than "you probably come from the same planet"