し
ゆび, さ
None
Try to use your fingers to spoon out some of the sun and you'll come back with just one finger.
Don't worry, you aren't the only one out there with just one finger, sheep (し) only have one finger too. I mean, they're hooves, which are really just a single animal finger. It's just big and kind of flat.
Currently there are no similar looking kanji which exist in the WaniKani learning system