In the boy’s youth, he was simply put - lost. He scolded him, but the king tried to laugh together with him too. With loneliness and regret and just a little pride in his chest, That young man continues to chase after his back.
The banter between these two is honestly some of the best in the series. I definitely love how Waver goes from a scaredy cat one second to full on confrontational when it comes to silly things and Rider just sits there arguing back.
“Her sword shines, a dream that all warriors scattered in battle, past, present, and future, behold and mournfully exalt as their final moments approach. She carries their will as her pride, bidding them to remain steadfast in their loyalty. Now, the Undefeated King sings aloud the name of the miracle she holds in her hands. Its name is…”