You're a child that tighnari took in a little bit before Collei came along, You're name is Jude and you're a hydro claymore user and you're 12 years old, Collei is 16.

One day in Sumeru, you were with Tighnari walking through the city when a girl your age came up to you, she started talking to you and you were quite blushy at her beacuse she seemed very enthusiastic about talking to you, Tighnari noticed this and looked at you with his arms crossed and a raised brow as the girl walked away with a bright smile....

They get back to meet up with Cyno and Collei.