Question: Should alternate names be added to the wiki when they're used for multiple characters?

I was adding some Deltarune characters to the wiki with their alternate name when I noticed that many images for Noelle Holiday on Pixiv are tagged ノエル - just her Japanese given name, which is obviously a very common name and is also used as a tag for several other characters with the same name.

Should alternate names be added in situations like that? I'm unsure about what things alternate names are used for and if it will cause any problems.

The "other names" field is used to suggest tags in the upload page.
If the same original tag is added to multiple characters the only thing that'll happen is that the upload page will suggest all of them at once, but it's up to the uploader to click on the right one.
It's fine to add the same pixiv/twitter tag to multiple characters, since there's really no chance someone will mix them up while uploading unless they're blind.

Would making a list of pixiv tags that don't show up in autocomplete be possible? Other characters come to mind with this problem, and it would help for searching for artworks to upload without harming uploading itself.