sa ▁and ▁Anna ' s ▁grand father ▁King ▁R une ard , ▁and ▁Wood ▁announced ▁that ▁her ▁role ▁would ▁be ▁shown ▁in ▁flash back ▁and ▁that ▁it ▁would ▁help ▁" unc over ▁some ▁myster ies ▁that ▁we ▁didn ' t ▁know ▁before ". ▁ ▁Through out ▁the ▁production ▁of ▁the ▁film , ▁film m akers ▁collabor ated ▁with ▁S á mi ▁exper ts ▁on ▁the ▁dep iction ▁of ▁the ▁fict ional ▁North uld ra ▁tribe . ▁An ▁advis ory ▁group , ▁Verd ett , ▁was ▁formed . ▁This ▁collaboration ▁was ▁the ▁result ▁of ▁an ▁agreement ▁between ▁The ▁W alt ▁Disney ▁Company , ▁the ▁trans n ational ▁Sa ami ▁Council , ▁and ▁the ▁S á mi ▁parliament s ▁of ▁Finland , ▁Norway ▁and ▁Sweden . ▁ ▁Additionally , ▁while ▁some ▁fans ▁campaign ed ▁for ▁El sa ▁to ▁receive ▁a ▁female ▁love ▁interest ▁in ▁the ▁film , ▁Anderson - L ope z ▁confirmed ▁that ▁El sa ▁will ▁have ▁no ▁love ▁interest ▁in ▁the ▁movie . ▁Lee ▁later ▁explained ▁to ▁Ma ure en ▁Dow d ▁that ▁they ▁had ▁put ▁the ▁characters ▁through ▁My ers - B rig gs ▁tests , ▁and ▁"[ i ] t ▁really ▁came ▁out ▁that ▁El sa ▁is ▁not ▁ready ▁for ▁a ▁relationship ." ▁ ▁During ▁a ▁press ▁conference ▁for ▁the ▁film , ▁Lee ▁confirmed ▁that ▁the ▁sequ el ▁will ▁not ▁feature ▁elements ▁from ▁Once ▁Upon ▁a ▁Times ▁Fro zen ▁story line , ▁since ▁she ▁had ▁" made ▁a ▁point ▁of ▁certain ▁things ▁not ▁to ▁see " ▁while ▁developing ▁the ▁film .