乐: Happiness, joy. The character "Ji" is auspicious and signifies a carefree, cheerful, and comfortable life, often used in names to convey a sense of ease and contentment.

嬉: Play, frolic: to engage in lively and cheerful activity. To romp and jest. To laugh and joke. To smirk and grin playfully. Describing a person who is vivacious and full of energy.