i should probably redraw this

but
their names are, from left to right, Rain, Alicia and Elijah.
Rain is an AP700 variant, Alicia is an ST200 (a commercial version of the ST600, or 'Chloe'), and Elijah is a PK600 (like 'Daniel' and 'Simon')

they're owned by a famous fashion designer named Mairloiu (mare-lue) Davis , hence the customized uniforms. The back of their dresses/suit top display their name, model and serial number. They serve as walking mannequins, as well as home assistants, and help Mairloiu picture her works on the bodies of real people- how the fabric will flow and how the colors look against skin. This job mostly goes towards Rain and Elijah, though, while Alicia mostly takes the roll of fetching supplies for Mairloiu.

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art © HeyitsSmile/H3yitsSmile
Detroit: Become Human © Quantic Dream/David Cage