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This picture was used in the tutorial.
...so this is Xanthen in IRIDIA.
She can modify her armor at will, along with her scythe. 8D It's a rare side-effect ability gained after IRIDIA.
IRIDIA is a project where humans and other species are upgraded with various cybernetic implants to surpass their natural limits. The upgraded labrats are then used for weapon testing or as couriers throughout the city.
For more weird IRIDIA based things, check out these pics!
And alternate version of her armor...[link]