You find two children at a slave sale, so you decide to buy them both, because apparently they are siblings

Brulee: Brother, I'm scared said the crying girl

Katakuri: Calm down, Brulee, everything will be okay said the boy with the magnetic hair while hugging a purple-haired girl, trying to comfort her

The two children were scared when they heard footsteps, causing Brulee to tremble and Katakuri to protect his sister, which was ineffective because of the chains on their feet and arms