Most fanart comes from Pixiv, the one Japanese artist community that very few people know about. Unfortunately, you can't really navigate on it unless you have an account and know those Japanese symbols. I can help there. c:
I kind of have no life, so I can search for pictures for your characters in my free time; I binge all of the pages anyway. For the most part, I handpick the ones that look nice, in my opinion. And by that, I mean I usually go for images with 50+ stars with the exception of 30+ every here and there. Your character albums will be expanded. How much depends on how popular the characters are in the Japanese fandom; someone like
Corn will have ~100-ish high quality pictures because Tales of series is super popular over there.
And
no, don't give me your Kantai Collection or Touhou characters. I'd die. Those guys are way too popular and I'd be stuck with 500+ pages. Q-Q
Please do one of your characters at a time. I'm actually a busy Echo in disguise. Give the name of your character and then their faceclaim's name (whether you feel like giving it in the Japanese symbols or not is up to you).
One final note - I'm not going to be looking at your already-made albums. There may be repeats from them as I'm scrolling through Pixiv and I'm sorry, but I'm not going to try and memorize what you guys already have. I have pretty bad memory as is. :c
As for the size of my albums, I actually haven't Pixiv dived for my own characters yet, in case you were wondering. It never really occurred to me to do this until now.