Illya stretched out a mittened hand, watching the snow slide off the wall. She’d come to the Emiya residence to poke fun at Shirou, in what was becoming her normal schedule, but her brother hadn’t arrived home yet, so now she had an opportunity to set up a snowy ambush.
Though she’d grown up in a castle almost permanently covered in snow, she hadn’t been allowed to play in the snow very often, since it was considered bad for her health. Of course, playing in the snow now probably would have the same effect if she stayed out too long, but there wasn’t any reason she couldn’t engage Shirou in a snowball war for a little while.
The white-haired homunculus crept to the front gate and peered out carefully; she spied the red hair of her brother easily, and grinned to herself. Her victim was approaching. She hurried back to her mound of snowballs, placed near the wall for easy stacking, and to keep anyone else from possibly crushing them by accident. She didn’t want Taiga to end up driving over them in her scooter, for example.
She picked up a snowball in either hand; she was a bit concerned that her aiming wasn’t going to be very good, but as long as she hit Shirou that wouldn’t really matter. If she could have, she’d have tried to aim somewhere in particular, but truthfully, given her strength, she’d be lucky enough to hit him in the first place.
She heard the gates creaking open, and readied her snowballs. As soon as her brother stepped inside, before he would have seen her, she launched the snowballs, hoping that she’d actually hit him, and called, “Shirooou, come play with me!”