Hirelsanna is the name of the pairing between Hiro Hamada from Big Hero 6 (2014), Queen Elsa of Arendelle and Princess Anna of Arendelle from Frozen (2013). As one of the more unorthodox pairings in the fandom, it can be considered a melding of the Hiranna, Hirelsa and Elsanna pairings
Relationship Overview
Although it is a love triangle, it is rarely used as such, in fact in most cases it is shown as an adoptive sister-brother relationship.