–I'm going to preface this by saying I've taken the liberty of assigning this story's Corrin the hair colour I chose in-game so it won't be default white, also my goal is to get through Jakob and Corrin's time together at the tower and throughout the war and post war with out it dragging on forever so, here we go!–
Corrin anxiously paced the floors of her room. They'd be here any minute. She adored visits from her siblings, they were all the young girl had to look forward to. Her crimson eyes shot to the window as the sound of hooves on cobblestone announced her siblings arrival. With a delighted trill she darted from her room and down the stairs to wait for them, her bare feet slapping loudly against the wood the entire way. She was lucky Gunter was outside waiting to greet her siblings or he would've already scolded her for neglecting to put her boots on.
She waited in front of the doors, rocking back and forth on her heels. Quite, unladylike like of her, but she never seemed to be able to keep her joy under control. Minutes ticked by and she began to get rather impatient. What was taking so long? She climbed the first two stairs and peered out of the only window she could reach, she saw Gunter and Xander discussing something. The conversation appeared very lively and Xander kept motioning toward the carriage they'd come in on. Where were the others? She sighed, blowing a thick lock oh her copper bangs out of her eyes in the process. "Cooome onnnn!" She groaned.
Suddenly Xander went back to the carriage, for a moment she worried they were leaving, but that fear was quickly vanquished, Xander came around the corner a moment later, Leo followed after him, Elise was curled up in his arms sleeping, she must've fallen asleep along the way, this was only her second trip to the tower after all. There was a moment's pause and Camilla emerged from the carriage, approaching the others, hiding in her shadow was a young boy. He immediately caught Corrin's attention. He was probably her age, with pale white skin, a large red cut across his nose. His hair was long, white and tied back in a matted pony tail, his bangs hung over his tired looking purple eyes. He appeared nervous, but graciously offered his hand to Gunter, who shook it and slapped the boy warmly on the shoulder before motioning toward the tower.
As the others talked the boy's eyes scanned the tower, he seemed to have noticed Corrin spying on them as his gaze lingered on the window she was looking through. She hesitantly lifted her hand and waved at him, he returned her gesture before turning back to Gunter. The group turned and headed toward the tower. From outside Corrin could hear Gunter guffawing and updating Xander on Corrin's training regimen. She returned to her place in front of the door and waited to greet her family… And the boy. Though she still didn't know why he was here.
With a loud creak, the doors opened and Xander crouched down with his arms extended to scoop up his little sister. She ran as fast as her feet could take her to her brother. She lept into his arms, wrapping her arms around his neck and locking her fingers together. He kissed her cheek: "There's my little princess!" Xander lovingly chided. He sat her down and ruffled her hair. "Still no boots?" he asked, raising one eyebrow and glancing toward her dirty feet. She sheepishly looked at them herself and rocked back on her heels again. "I'm sorry" she muttered.
Xander grinned at her, "I'm only teasing, you know I don't mind. But my little princess make sure Father doesn't catch you like that!"
"I won't, I promise!" Her normal, bright tone had returned, but a question lingered on her mind. Now seemed as good a time as any to ask "Do… Do you think Father will let me return home with you now?"
Xander's smile faded and he kneeled down to Corrin's eye level "Not this time love, but, we did bring along a little something for you, hopefully you won't feel so lonely now." He stood up and shuffled aside, allowing his siblings to file in behind him. Camilla walked up slowly, she ran her long fingers through Corrin's hair. "Darling;" she said before slowly moving to make the boy behind her visible "Meet Jakob, the new servant boy, your new servant to be more precise. He's your age, hopefully you'll get along."