まじ, ま, か
You put a lid on your father. But, he won't taste good alone, so you mix in some other ingredients. They mingle inside the pot with him.
With a mix of your father and other ingredients mingling in your cooking pot, you lift up the lid... your father pops up. Your father is こういち. He stares back at you with a big smile.
Currently there are no similar looking kanji which exist in the WaniKani learning system