りゅう, りょう, ろう
The imperial radical and the imperial kanji are exactly the same! Wahoo!
Who is the coolest imperial you know? Ryu (りゅう) from Street Fighter. Wait what? You mean he FIGHTS imperials? Oh, okay. Looks like Ryu is the coolest imperial FIGHTER you know!
Currently there are no similar looking kanji which exist in the WaniKani learning system