Ahh heck nah, Nina that basic cardboard plot device of a background character will be relevant to Gojo??? If you are making this a one girl or no relationship type of story toss the girl back to the sword kingdom or worse cuck her with a cheep hoe on the streets than her being anywhere near the mc. She is more useless than Sakura in Naruto, more annoying than the tsundere archetype, more virgin than olive oil, no plot relevance, and is reduced to a wife for the future sword god in the novel. I don’t usually protest love interests in fanfics seeing as this isn’t about me, but she is grade A trash of the highest degree and should be treated as such. In fact you made here the same in the novel and let her get backshooted by that dude in the dojo nothing would be lost and everything gained.