。
She absolutely has to come here.
Literal
She [topic-は] here [to-へ] without-fail come must.
Two layers of strong necessity stacked together. ~なければならない (here in the contracted spoken form 来なければならない) is the standard 'must / have to' construction — literally 'if [one] doesn't do [it], it won't do.' On top of that, 必ず ('without fail, definitely') sharpens the obligation into something close to a demand. The へ marks the destination; に would also work here, with へ slightly emphasizing direction-toward-a-destination over arrival-at-a-point.