Nouns

(n)sympathizer, sympathiser, comfortera person who commiserates with someone who has had misfortune
(n)reliever, allayer, comfortera person who reduces the intensity (e.g., of fears) and calms and pacifies“a reliever of anxiety”, “an allayer of fears”
(n)quilt, comforter, comfort, puffbedding made of two layers of cloth filled with stuffing and stitched together
(n)comforter, pacifier, baby's dummy, teething ringdevice used for an infant to suck or bite on