I really like Ariana Grande and her esthetics. It's kinda modern Sailor Moon. Embracing the 90's and 00's with her own signature look. So I don't mind that Ayu is inspired by Ariana's style. Her eyes are more poppin' than ever, and I hope she is going to rock her own twist to the Ariana flair.
Edit: I found this once on Instagram, it is a fan animation of Ari's tour outfits. This is the esthethic I am talking about... sooo if Ayu would do something likewise, I will be over the moon!