Saya is a very inquisitive person and is content to find out how and why everything works in the first place. She is depicted throughout the story as the person who tries to find reason for everything that has happened, even down to breaking the rules to find out what the rules are. She carries questions that she keeps finding just by going around, and will keep traversing throughout the world of Arcaea to find answers.

Arcaea
Arcaea are melodical shards of the past that call out to the girls, but each chooses to be experienced only by one or the other. Over time, the girls begin to notice inconsistencies in the Arcaea that choose them and develop conflicting views about the world as it once was.