buoyant

(s) tending to float on a liquid or rise in air or gas
- buoyant balloons
- buoyant balsawood boats
- a floaty scarf
floaty,
(s) characterized by liveliness and lightheartedness
- buoyant spirits
- his quick wit and chirpy humor
- looking bright and well and chirpy
- a perky little widow in her 70s
perky, chirpy,

floaty perky chirpy

buoyantly