All 4 Uses

blithe
in
The DUFF: (Designated Ugly Fat Friend)
(Auto-generated)

Casey Blithe walked out of the gawking group of gradeschoolers and came to stand in front of me.†
p. 38.4

blithe = carefree and happy
Miss Waller (formerly Mrs. Blithe; she went back to her maiden name after the divorce) could have had a much nicer vehicle.†
p. 185.1
Mr. Blithe had offered to buy her a Lexus, but she'd refused.†
p. 185.3
Unfortunately, Mr. Blithe had lost what generosity he ever possessed after the divorce was finalized.†
p. 185.7 *

Definitions:

(1) (blithe)
carefree and happy -- often unaware of or ignoring something that should be of concern
(2) (meaning too rare to warrant focus)