Jealous, jaundiced, jubilant, joyous, judicial, jaded, joker, jolly, joyful
jolly, joyful, jealous jovial, juvenile
Unique.
kind
Independent.
reactive.
One personality trait that starts with "Y" is youthful, which describes someone who exhibits the characteristics or energy typical of youth or being young.
kind
rough.
rough.
kindness
=Self-discipline=
Jovial