This is Lumi! My pilot I've been working on for LANCER. She's a full body cyborg who decided she might as well optimize her own body for her job if she's going to be a machine piloting a machine and has had a coolant factory and tank built into her. She functions as both her mech's pilot, and it's cooling system - using the ability Black Thumb to be able to dispell heat from her mech at a faster rate than a normal pilot in exchange for her not being able to directly focus on the controls. That's where her NHP AI installed in her body comes in, a more hotheaded passionate combatant who's at the controls when she's focused on doing support actions using her body. Obviously this strategy leans towards high heat builds, so she's running a world killer ghengis build with a flamethrower and heat laser and doubling it with explosive venting and nuclear cavalier

Both her and her AI talk through her mouth with her voice and emote through her body like normal, having full access to all her limbs and the like. The only way to tell who's talking to you is by speech mannerisms or by paying attention to her eyes (which glow blue for Lumi and red for the AI). She's anxious and shy herself, while her AI is more domineering and confident. She regularly swells up with coolant if she isn't piloting or finding a way to vent out excess pressure, which makes Lumi a blushy stammering mess - her AI knows this and is very protective of her but also teasing and likes to own her over it (words like princess are thrown around quite a lot....).

She has 2 larger arms for carrying heavier objects, assisting with mech repair and wielding heavier weapons (like her mech multi-tool turned blunt weapon if she needs to fight outside of her mech). They fold away into slots on her back and extend when needed, which is very convenient when you have two consciousnesses in the same body so they don't fight each other for control of her arms.

Her callsign is Ouroburos and her and her AI are vaguely themed as ice and fire dragons

Thanks so much  Samael for this super super cute pic of her <3