"NOBODY SMACKS ME AND GETS AWAY WITH IT! PREPARE YOUR BODY ILLYASVIEL VON EINSBERN, I COME FOR YOU!" Shirou roars after Ilya, he turns around and snatches one of the pillows off of the couch and runs after her passed the two maids who eye him curiously.
Shirou hears Ilya's giggling echoing through the mansion as he chases her in the direction of the noise. She moves awefully fast for having those short little legs. "Onii-chan, this way!" Her voice echoed from what sounded like one of the side hallways on the second floor.
He senses a trap. It would be just like her. Shirou carefully goes up the steps, carefully testing each one before putting his full wait on it. He half expected the staircase to open up into a slide leading into a dungeon. "Onii-chan!" Her voice called again.
"ILLYA THAT'S REALLY CREEPY!"
She answers him with more giggles. This isn't Silent Hill dammit. Well whatever, at least the lights were still on. Shirou turns down the hallway her voice was coming from. The hallway was long and had expensive looking red carpet leading down the length of it. There were many doors on the right side. He approaches the first one and flings it open.
"Gotcha!" Shirou yells and prepares his pillow for attack. However the room is empty. It looks like a guest room or something, maybe one of the maids' rooms. Shirou enters the room and looks it over. Under the bed? Nope. Behind the door? Nope. All that was left was the closet, the doors creak open.
"Weeee!" Ilya exclaims excitedly as she pops out of the closet, smacks Shirou across the face with a pillow and slides in between his legs and out into the hallway all the while giggling happily.
She ran the other direction so Shirou quickly turns around and goes after her. He sees her small form running down the hallway, she looks back at him, gasps and runs faster passed the stairs to the opposite wings of the house. After a few steps she trips and falls over.
"Owww." She curls into a ball and holds her knee. Her crimson eyes hold tears at the edges.
Shirou stops and observes her, something doesn't seem quite right.
"Uuuuuu." Ilya whines. She seems to be crying. Maybe she really did hurt herself.