Board Thread:General Discussion/@comment-35616940-20190219180209/@comment-1038387-20190219195846

An image gallery as a separate subpage - especially if it has little to no text - is treated as a junk page by search engines because it can't scrape anything. If you have too many of them, it can bring down your SEO.

If you have a gallery, it shouldn't be "every image of the character"; it should be just the most important images (different looks, iconic images etc) and preferably in a sub section of the page.