A bit of context: I wanted to improve searchability of omori characters by having the child tag to images that depicts the younger version of the main characters. I added male_child and female_child to applicable images, but as these two tags currently do not implicate child, so as a result omori child doesn't work as a way to search for specific fanarts of this franchise.
From a discussion on Discord, a parallel issue revolving around the adherence of only using non-nsfw images on male_child and female_child was mentioned. However, I do not believe there is a logical basis to prevent those two tags from implicating the child tag.
Thank you for consideration.