Ying Zheng, more known as Qin Shi Huang, was the first emperor of China who united the land after 500 years of endless conflict. He's the Servant of the Yggdmillenia head but mostly operates on his own and guards the Holy Grail located beneath Ningwu. Though possessing several Noble Phantasms, he is not suited for combat and unlike other Casters, he has no knowledge of magecraft. Zheng is the epitome of a king who rules from the throne and spreads his power through his militia.

Allegiance.
Zheng's interest is the interest of his country. Even should he have the desperate desire to attain the Grail, Zheng is unlikely to put that before China. Given this, you can guess that the Black Faction, who stole the Grail and brought the war here, is his worst enemy. That doesn't mean that he intends to outright betray the Black Faction and surrender the Grail to the other side. Though it's the Black Faction to blame, Zheng has no choice but to rely on a side he could trust to be his allies for now. He will play the role of the observer until he can distinguish friend from foe. The grail is a powerful item. Zheng wouldn't want it to fall on the wrong hands, including his own Master's. In general? You can trust Zheng to be one of the good guys.

Historical interpretation.
If you're not familiar with Chinese history or haven't looked him up in the wikipedia, then you should know that Zheng was known as a mad tyrant who hungered for power and immortality and ruthlessly executed his enemies. It's only partially true. Zheng was ruthless. It was something demanded of him if he wanted to accomplish the dreams of kings, but he was also merciful and benevolent. Unfortunately, this was understandably overshadowed by his aggressive reforms in his urgent pursuit to ending long-term issues in one generation. Zheng was determined to spill all the blood now than have to spill twice of that in the future.

But that was not the sole reason. The other half was that he did become mad. Mad as in crazy. His meals was spiked with an alchemist's concoction believed to extend lifespan, but its primary ingredient, mercury, obviously does the opposite. After five years, it took a toll on him. It's not what made him go crazy, but it's what made him mentally unstable, leading him to breaking under pressure until he couldn't take it anymore.

He can still go crazy now, jsyk.

Boy band.
One of Zheng's Noble Phantasms gives him an entire army and they're not limited inside a Reality Marble. He can raise 10, 000 men here and now and probably take over the world. Fortunately, he's Lawful Good and Ruler can just out-hax him or something. Zheng's army is more of a plot-thingy. Other than that, he'll only have a handful of his generals - familiars - moving around. They have their owns apps and accounts since they're Zheng's main muscle. 

Zheng's familiars are more human than Servant. They have their own physical bodies, which are Noble Phantasms themselves. They don't need to eat or sleep, but they can't go in spirit form or anything. Zheng would have to "deactivate" them and then put them away. They still "die" through the usual methods.

MENG WU - This guy is the only person who I can think will fight and be killed. Wu is going to be the familiar Zheng is going to use until someone kills him off. Looking forward to that part. Before that though, I'd like Wu to fight someone with an army. Gotta show off those skills first before dying. 

MENG TIAN - Zheng's personal secretary most trusted subject. Tian is played by Vira and pretends to be Zheng's master. If you want to plot with him, you'd have to talk to Vira about him, though I'd be involved by default as well lol. 

LI XIN - Zheng's best friend. Xin's NP makes him very handy for recon. He might be mentioned in posts and be actively running around already, but I might not RP him yet. Plots can definitely be made with him though to build up for his actual appearance. Overarching stories! I guess if I'm short on characters I can play (Zheng being an observer, Wu not exactly a social person), Xin can step in for some threads.

WANG BEN - Zheng's trump card. Sorta. He's not going to come out yet until Wu dies or if absolutely necessary. Zheng is saving Ben, preferably when he wouldn't have to stay low anymore. Ben's going to ATTRACT attention. 

CHENG JIAO - Zheng's half-brother. You can plot with this guy, but honestly I just made him as a support for Zheng. He might have lines and his NP can be pretty useful in identifying Servants. 

Relationships / Bonds.
Whatever goes. Zheng's not one to open up easily and he's not going to be distracted taking care of a person, like being their friend or something. He's fighting a war. And Zheng never had the leisure to know what an ordinary life is anyway. He can definitely form bonds with others. Zheng is unable to express any sort of affection. He may be just contented being in your presence while reading a book. 

Zheng interacting with other Servants is obvious. Interacting with humans though - that'd be cool too. I suppose it's more likely with the other Masters of the Black Faction. Fortunately, it's not hard to find Zheng lol. And he and his Master aren't together either.

Others.
If you want to run into a fight, I'm up to it. I have many ways for it lol. Zheng is going to focus on building his territory then I think he might tour around the town.

Thread ideas.
tba