I like how she shows her true colors here. When he's not in a state where she can play with him, she's forced to do a 180 and go into serious mode, but she has to debate herself internally for a bit.
@Hollow7F @Xxjuggernaut Also Uzaki is a bit of a dumbass and probably wouldn't visit her senpai when he is sick to nurse him back to health. She'd probably visit him because she wants to mess around with him, realize he's sick, and throw a fit about it.
Nagatoro is a tsundere bully with a heart of gold, Uzaki wants to be your best friend, but is too immature to admit she likes you.
Personally I lean more towards Uzaki because Uzaki normally won't physically hit or abuse you, she'd just be too dull to realize she's a dumbass