KanjiJLPT N1
Lunatic

lunatic, insane, crazy, confuse

Mnemonic

A beast breaks into the castle and devours the king, then sits on the throne wearing the crown sideways, howling at the moon and issuing decrees that everyone must eat raw meat. The terrified court realizes their new ruler is a complete lunatic.
Additional thoughts
Picture the beast on the throne, crown crooked, drooling and wild-eyed — the ultimate image of madness ruling a kingdom. Beast on the left, King on the right, just like the kanji.
Quick recall
A beast eats the king and rules the kingdom as a howling lunatic.

Details

The keyword for 狂 is lunatic. This kanji conveys the idea of madness, insanity, or being wildly out of control. It describes a state where someone has lost their reason and behaves in a frenzied, irrational manner. The concept extends beyond clinical insanity to include any kind of extreme obsession, fanaticism, or deviation from normal, composed behavior.
On'yomi
きょう
Kun'yomi
くる.う、くる.おしい、くるお.しい