Thread:TheGreatEye/@comment-25578610-20150830103340/@comment-121.54.58.246-20150830122928

They guy got most of them from the character designer's own website: http://r-s.sakura.ne.jp/

Manga sketches are literally taken from the manga itself. If you're gonna put stuff like character designs in your wiki you'd need the website where the artist/publisher puts those stuff in. Sometimes the manga's tankobon/volume releases contain artwork or sketches as well, like Touma's dragons. The official website of the franchise might also contain them as well, like the project-index page having the anime designs for the characters.