It's wild how much warmth people attach to round, chubby characters — they’re often the ones who stick in my brain. I’ll kick this off with a handful of names fans always bring up: Choji from 'Naruto' (the emotional, food-loving shinobi), Totoro from 'My Neighbor Totoro' (a giant, comforting forest spirit), Doraemon from 'Doraemon' (that iconic blue robot cat), and Majin Buu from 'Dragon Ball' (absurdly powerful yet childlike). Each of them lands differently: Choji is about growth and self-acceptance, Totoro is pure comfort, Doraemon is nostalgia incarnate, and Buu is chaotic fun.
I could go on: Yajirobe and the rounder side characters in 'Dragon Ball' get a soft spot for their comic timing, Wapol in 'One Piece' is a cartoonishly greedy chubby antagonist, and Kirby/King Dedede—especially from 'Kirby: Right Back at Ya!'—have that squishy design fans adore. The fandom loves them partly because their shapes make them instantly expressive; animators use bulk for slapstick, heart, and visual warmth.
Beyond the designs, chubby characters often carry messages: body diversity, comic relief, or surprising strength (emotional or physical). I always find myself drawn to the ones that pair roundness with kindness or unexpectedly deep arcs — makes me grin every time I rewatch a scene with them.