JCoxeye's Leitmotif Index:
'Fallen Down'


('Fallen Down A' and 'Fallen Down B', as heard in Fallen Down)

'Fallen Down' is the theme of Toriel.
It only appears in a few songs, all with direct relation to her.

Notably, Fallen Down was orignally composed for the 2012 Earthbound tribute album I Miss You, as discussed here:
On the Origins of Undertale and Deltarune's Leitmotifs