You're actually allowed to use Honeyselect to create a game, because Honeyselect is simply a creation device like Microsoft Word or Adobe Photoshop
The dev has made his/her own characters using a creation device, so all the characters are the dev's property. Kinda like if I write a cool story on Microsoft Word or make a dope image using Adobe Photoshop, it's my work. Yes, I couldn't have made my creation without the help of Microsoft Word or Adobe Photoshop, but nonetheless, it's still my work.
I think what you're getting at is that you're not allowed to use Honeyselect models created by other devs, because that's copyright infringement. So I can't just take the character models from Deviant Anomalies and plop them in my own game, because the character models from Deviant Anomalies belong to MoolahMilk.
I've seen several users of HoneySelect (and Koikatsu, which is a more anime-like Honeyselect) land in hot water because they ripped character models from other devs. So I think this is where you're getting confused at. Using Honeyselect models is completely fine, you just can't take other people's HoneySelect models without permission to make your game.
Of course, this is just going by the assumption that MoolahMilk has made all Deviant Anomalies characters on his/her own . I've got no reason to believe otherwise, but alas, I don't have any proof affirming my viewpoint as well.
Hope this helps!