>>3756964Yeah, Saucenao's easily the best for finding anime, manga, and fanart sources. As long as it's not cropped, it can generally get it. If it's cropped, then Google/Yandex can usually find it or the uncropped version, which you can retry with Saucenao, if they didn't already give the source from the uncropped picture.
If it's from Twitter, then Ascii2D is generally the only one that can reliably get a source on it, but Google and Yandex can sometimes do it, too.