When a man meets a tiger he makes the tiger his captive. Men are pretty crappy like that. They see tigers and they want to put them in cages, so the poor tiger becomes a captive of the man.
The captive tiger is even sadder because the man put him in a robe (りょ) and is making him act like a human. Tigers look good in robes, but they don't really enjoy being forced into people clothing.
Currently there are no similar looking kanji which exist in the WaniKani learning system