Sweet! I'll quickly write a CS.

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Name: Rosalina 'Rose' Knight
Age: 20
Personality: Calm, humorous, always happy.
Bio: Rosalina served two years as a marine, serving as a scout that would rapidly run from position to position, calling out targets with perfect efficiency. She then was transferred to the ODSTs for her skill. Throughout the time serving in the UNSC, the smile on her face very rarely disappears.