effervescent
/ˌɛfəˈvɛs(ə)nt/adjective
Lively, cheerful, and overflowing with energy and enthusiasm.
Example sentences
- “The tour guide's effervescent manner made even the museum's dull rooms fun.”
- “Her effervescent personality made her the life of every party.”
Literally it describes fizzy drinks, and the figurative use keeps that image: an effervescent personality bubbles. Compare 'ebullient', a near twin.