Just another day in Chaldea. Another Chaotic day, that is. For the most part, everything's just as loud as usual, but today was a special day, as Gudako is going to summon another Servant!

Gudako stands in front of the summoning circle, behind her was her twin/fellow Master Gudao and Demi-Servant Mashu.

The room light up as the orbs glow a bright gold. When the blinding lights finally fades away, smoke fills the room.

"Wha-where did the smoke come from?! Did we break something?!"

From within the smoke, the silhouette of a incredibly tall and slender woman can be seen

"I have heard your call, young one. Caster, the Dimensional Witch has answered your call~"

Now that the smoke (which turned out to be from her red Kiseru pipe) has cleared, the two Masters and Mashu can finally see the woman in front of them.

She looked truly otherworldly. Hazy, blood red eyes. Long, flowing ankle-length hair looked like the sky on a starless night. Unnaturally pale skin, one that you'd expect to see from a dead body, rather than an actual living person. She was an elegant white kimono with purple accents and dark butterfly wings to complete the dress.

Caster looked at Humanity's hopes, as if looking into their very mind. They weren't able to even think, as the aura around her-one which felt like it was made of all the mysteries of space and time itsel-had completely entranced them, it wasn't until she spoke again that they were able to respond properly.

"And I'm guessing you're my Master?" Caster said as she lifted the red head's chin so their eyes could meet

"Y-yes...um... I...ah...I-I'm...my name is Fujimaru Tatsuka, and this is my twin, Ritsuka and our kouhai and Demi-Servant Mashu Kyrielight..." The Master stumbled on her words

"So tell me young ones, why have you decided to risk your lives for this world?"

"I-...we want humanity to continue, we want to keep seeing the people we hold dear... so that humanity can continue enjoying the simple everydays."

"That is indeed a noble cause, I'll be happy to be a part of your mission then, but..." Caster said as she moved back a step "You'll need to learn a lot more."

"Yes, we're aware of it, and we'll all try our best!" Mashu said

"Yeah, humanity's fate's resting on our shoulders after all!" Gudao nodding in agreement with the Shielder

"And it looks like they're in good hands, too. From now on, I'll also be teaching you children, just so you have a deeper understanding. First lesson, don't tell a stranger your true names, because some can use it to control your fate. Call me Ichihara Yuuko by the way, and yes, that's not my real name." Yuuko grinned

A.N:

If you know me, you'll know that I definitely got much, much more ideas when it comes to this specific kind of crossover and that's probably gonna be most of what you see me write =3=

And if you're wondering about Gudako's name choice, it's actually written exactly like Fujimaru Ritsuka(Yes, I used Google translate for that), but read differently. And remember, in Japanese (and a good chunk of Asian) culture, family names goes before given names, that's why Mashu's first name isn't in front of her given one like the Gudas'