Depending on what happens:
If the demon has not been Kao'd by the time Hope acts:
Hope keeps the wall up as her companions fight the thing. The air around her turns electric as she unleashes her most potent attack. Lightning seems to strike from all directions, all homing in on the demon, forming into one powerful blast.
(Power attack for as many hit points as she can get, Blast 12, Imp Crit 3, Knockback 4, Indirect)
If the demon has been Kao'd by the time Hope Acts:
Hope will spend a hero point to summon a Fire Storm and then send the thing back to wherever it really belongs.
(I assume she gets a hero point for being shot.... or not really hurting the thing the first time she tried attacking it.... I could be wrong)