This is the 3508th most frequent French word.
elsa
"Elsa" is a French proper noun, typically a given name.
Here, 'Elsa' is used as a proper noun, referring to a female name.
Elsa aime chanter des chansons.
Elsa loves to sing songs.
In this context, 'Elsa' identifies the possessor of the shoes using a possessive construction.
Les chaussures d'Elsa sont parfaites.
Elsa's shoes are perfect.
Here again, 'Elsa' expresses possession, it indicates the creator or performer of a song.