HCs for Kurogiri with a (gender neutral) s/o that absolutely despises Shigaraki's behavior (with his tantrums and whatnot) and won't mind tearing that boy a new one to get their point across that he's a damn baby ?
They/Them pronouns it is, my dude. Just a warning, this might not turn the direction you’d like it too, but I think it’s fairly accurate. Please don’t hate me.
Kurogiri
He loves his s/o. They are a pivotal reason why he keeps his cool and calm demeanor and concentrates on advancing the wishes of AFO and Tomura, as well as The League itself. He wants to have a world where the two of them can breathe easy- so having his s/o causing issues with the acting leader of The League doesn’t exactly help him.
He understands, god does he understand, how irritating Tomura’s childish actions can be and how disruptive and toxic they are. But, it is not their place to step forward and reprimand him. It is his.
He isn’t thrilled when his s/o attempts to chew Tomura out, in fact, it sets him on edge. Later, he knows Tomura will come back to him and complain about you, possibly threaten to tear you a new one instead of the other way around.
Of course, Kurogiri will warn Tomura to not even try, to not even think about it. He is a very neutral kind of man, but you are his lover and he will drill into Tomura’s mind how important and dear you are to him- through threats if he must.
Still, Kurogiri will be keeping a watchful eye on Tomura. He knows that the young leader is a ticking time bomb and unpredictable. One wrong word to him, and Kurogiri’s lover could be ashes in the wind.
The point to take from this is is that Kurogiri will keep Tomura on a leash as well as he can. Do not step in and try to take that leash from him, because Tomura is known to bite.