Rosetta is shown to be very friendly, befriending Noah, CM, and Luna on their first day of attending Hakoniwa High. She also forgives Luna for spilling her food on her at lunch.
However, she is the first one to take a photo of Sara and Noah on their first day when people are laughing at them.
She's industrious but still trying to fit in with her peers, currently working at a general store. Her moral compass is still developing as well, as shown by various interactions, including sticking up for a boy when Melody makes a remark behind his back.