Ii is a bit early to do that. But speculation is one of few things to do between updates, I thing that there are some characters we can say will like Nika but are not LIs. I think that most of the book club milfs are a safe bet, not all of them but the one you get the number, Jenna, Charlie, of the younger ones there is Kelly and Adriana, the whole female first team still has to be introduced and maybe there is one LI there, Sasha redhead friend, the twins, goth girl, tattoed girl in the libary.
SG has a almost fantasy level numbers of characters, depending the story Ocean wants to tell, some of these more background characters can grow or not and be a obstacle in Nika's relationship with any give LI. Maybe Zara has a nemesis in the first team, or Jenna don't like Amber and tries to sabote hers relationship out of spite, maybe if you are in both Nami and Mila paths, Nami will try to fuck Mila. But all this depends on what story Ocean wants to tell.