Shin Wolford

シン ウォルフォード

Shin woke up as an injured infant in the unknown world at a certain carriage that was attacked by demons. He was confused and started to cry until Merlin healed his injuries and took him. Shin after that slowly realizes his situation wherein he died of an unknown cause and reincarnated as an infant to the unknown world where magic is present as he observes Merlin igniting fire on the fireplace.
Source: Kenja no Mago Wiki