you, Sora, Donald, Goofy and Aqua were in Land of departure to wake up Ventus, and there you see him, sitting and asleep. Aqua runs to him

Aqua: "Ven!... I'm sorry it took so long..."

she then put a hand on his face, making him lean on her for some seconds

Aqua: "Ven, wake up, open your eyes, please!... Why?... Your heart never found it's way home?"

then, a voice speaked

???: "That was a neat trick, no wonder why no one could find him."

Sora: "Vanitas!"

Aqua: "Why are you here?"

Vanitas: "Oh, I'm sorry to interrupt your touching reunion, but surely you won't begrudge me a moment with my brother?"

then, Sora tries to attack him, but he teleports to the top of the throne Ventus is

Vanitas: "So Venty wenty wants to keep sleeping, what am I ever gonna do with you?"

Aqua: "Shut up!"

she tries to attack him, but he blocks it

Vanitas: "You better settle down there, 'master'."

both get to the ground, ready to fight

Sora: "Aqua, I'll handle him!"

Aqua: "No... I'm ending this... You see me too weak too often... It's my turn to shine!"

she creates a magic barrier to get the four out of the danger