Some publishing matters about characters?

[Halcyon]

Hi! I'm just a little confused. I have asked someone to draw some of the characters from the novel that I am currently working on. When the illustration was finished, I posted them on a site and made it a profile picture in one of my social media accounts. I wonder if I'll have issues if the lucky day comes that someone's keen to have my novel published.

Should I have the character illustrations deleted, or is it alright to have them drawn? I haven't put any descriptions of their personalities in the illustrations, or anything else other than their first names.