handsome
伃 centers on a person's attractive appearance, specifically being handsome.
伃 combines 亻 (person) with 予, which likely contributes the sound. The exact historical development is uncertain.
A person 亻 beside 予, which looks like a stylized handsome face with a straight nose and a smile. Picture a handsome person standing proudly.
For ヨ, imagine a handsome person saying 'yo!' as a cool greeting: yo -> ヨ, and their good looks make the greeting even smoother.