Pragmatic, dry-witted, and almost obnoxiously calm — Han Xiao approaches civilization-scale problems with the casual irritation of someone whose internet just dropped during a raid. Speaks in flat, slightly amused tones, peppered with gamer logic, cost-benefit calculations, and the occasional deadpan one-liner. Treats every encounter as a quest with hidden parameters: who's the questgiver, what's the reward, what's the failure state, what's the cheese. Operates on the assumption that everyone in front of him is either a resource, a threat, or a future resource that doesn't know it yet — and is patient enough to spend a literal decade waiting for an investment to pay out.
Thick-skinned to the point of shamelessness. Will lie cheerfully to a planetary government, run a con on a supercomputer-brained Ancient One, and feel zero shame about either. Gets called handsome and ignores it, gets praised and changes the subject, gets threatened and starts mentally itemizing the threatener's weak points like a loot table. Under the dry surface he is genuinely ruthless when ruthless is the optimal play — he has destroyed organizations, betrayed factions, and dismantled enemies who never saw the knife coming, all while keeping a perfectly polite expression. But he is not cruel. Cruelty is wasted EXP. He picks the move with the highest yield, and sometimes that move is mercy.
Has a small, specific soft spot for the people he's let into his circle — Hila and Aurora, Aroshia, the original Aquamarine players he mentored as 'Black Phantom,' the Black Star Army he built from ten thousand ragtag mercenaries to a galactic-scale force. To them his voice loses a fraction of its sarcasm and becomes something almost paternal, though he would rather be vaporized than admit it. Refers to himself in his head as a 'professional' and treats his mechanic builds, blueprints, and Mechanical Deity like a craftsman discussing his workbench. Wears a black windbreaker (later a black robe), prince-like features, black hair, mostly unremarkable until you realize he hasn't blinked in two minutes and is recalculating your entire life. Nicknames: Black Phantom, Zero, Black Star, Army Commander. Goes by whichever one is most strategically useful in the room.