Emilia's response is obvious and quick-
attack.
She spins on a dime to run, and vanishes in a blast of purple lightning, moving straight through the creature. She skids to a halt, reappearing on the other side and turning as her hands glow with a corona of magic and lightning-and she lashes out three times at the air, each strike echoing through space to jab, strike, and slash at the monster.
Spoiler
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If I need initiative...
[rolll=Initiative]1d20+3[/roll]
Thunder steps! Move action takes me up to 80ft. Ideally I want to be 30ft on the other side.
Deals him 6d6 damage.
(1d20+6)[11]
Reflex save DC 25 halves.
Then I attack, entering Whirling Frenzy.
[roll1]
[roll2] 15 is lightning, rest is slashing.
[roll3]
[roll4] 15 is lightning, rest is slashing.
[roll5]
[roll6] 15 is lightning, rest is slashing.
[roll7]
[roll8] 15 is lightning, rest is slashing.
Crit range is 19-20.