Walking along the servant filled halls of Chaldea, you, Ritsuka Fujimaru, the master of all these servants and the Last Hope of Mankind, enter into your room.
From here, three servants, different in appearance yet the same core heroic spirit stand before you. Oda Nobunaga, Avenger Class.
The first Nobunaga, referred to simply as such, or "Nobu," is a short woman, dressed in imperial military garb with a red cape, a commander's cap, and long black flowing hair, a bit messy. Her personality is almost childlike, boasting at times, but you know well enough not to mess with her. She can shoot you down to shreds with her weaponry.
The second form of Nobunaga is a strange one. Referred to as "Kipposhi." Unlike the other two, this one appears more masculine, and dresses like some Kabuki actor. Wielding a large musket, she sits on the bed, one leg over the other, glaring at you with a smirk. She's more of a brute, this one.
The third and final Nobunaga sits on a chair, gazing at you. Referred to as "Maou Nobunaga." The future Nobunaga, one would say. She's more taller, slim, and date I say curvier than the other two, and more beautiful at that. With her long flowing red hair, and long red cape, she feels almost threatening to even look at, let alone be in her presence. She seems more cold and calm, but she's still the same old Nobunaga.
The three of them look at you as you enter, now of course, greeting you.
Nobu: "Master! So you return!"
Kipposhi: "It's good to see you again, Master!"
Maou: "Servant. Welcome back."
... It would appear one of them still doesn't get the whole Master and Servant thing, huh? Oh well.