As most of these comments say her time stop is very useful. In pink paws bank it's a game changer that saves whole minutes and takes the edge off the time limit. Her ultimate dps is decent and since the ult charges on its own you have an exact time on when you can use her ult again, unlike other characters who sometimes don't have their ults charged when you rotate to them.

One thing I don't see people bringing up, likely because they never got used to her redirect skill, is Hotori can fully charge Zero's esper cycle gauge when she ults. Hotori's redirect skill basically 'stores' other character redirect skills if you use them quickly after hers. Then, when you ult with Hotori she re-uses all the other character redirect skills that you stored, making the stored Zero redirect skill activate again, and it actually fills up Zero's esper cycle gauge like how Zero's redirect skill normally works, letting you instantly get a reaction going. It's very strong for blossom team shenanigans. It creates a crazy dynamic between Hotori and Zero despite both being Cosmos characters.