Who am I?

Silhouetted figures in hooded cloaks stand against a bright white background, then move into a dynamic combat scene with blue energy effects. The scene cuts to a red-haired character in a camouflage uniform looking surprised, followed by a shot of a blue-haired character from behind, then a close-up of the red-haired character with a determined expression. The sequence ends with a silhouetted character facing a large, glowing purple entity with tentacles.