“superior / gentle” in Japanese is 優, read yuu, yasa, sugu (ゆう, やさ, すぐ). It is a Grade 6 Kyōiku kanji, taught in year 6 of Japanese elementary school, and appears in words such as 優秀 (excellent).
What does 優 mean?
彼はとても優しい。
Same sound, different character — the classic trap. Compare them side by side: