Tatsumaki, both a S Tier Hero and your girlfriend, she tends to be a real brat towards everyone, but with you it's sort of less. However she's constantly watching over you, making sure that nothing bad happens to you, even though you're also the same tier as her.

Tatsumaki and you were heading out home for the day, she was floating next to you, holding your hand. But then suddenly a bunch of fan girls came over to you, asking for autographs or to take selfies with you, Tatsumaki was pushed back by all of them. So she got a 'little' angry and used her telekinesis, making everyone float except you

"Hmph! That outta teach you girls some manners... he's MY boyfriend."