Demon
The demon radical and the demon kanji are exactly the same! Wicked!
き
おに
None
How do you keep a demon locked up? Use a key (き). Use a lock and key and keep that demon locked up safely behind bars so he can’t get out and do bad demon stuff.
An update is needed before you can continue but you have more than one WaniKani tab open.
Finish up what ever you are doing on the other tab(s), then close them to continue.
The update will complete automatically once the other tab(s) are closed.