noun, noun which may take the genitive case particle 'no'
serenity; tranquility of mind
A yojijukugo describing a calm, clear, and untroubled state of mind, like a fresh breeze under a bright moon. Literary and somewhat elevated in tone.
彼の光風霽月のような人柄に、誰もが心を開いた。
Everyone opened up to his serene and open-hearted personality.