Daigo is a human orphan who made a name for himself as a mercenary, a true survival at heart, his family was killed by bandits causing him to endure harsh years of living on the streets, he begged passing adventurers to give him jobs as a luggage carrier, he worked diligently as a carrier until he got accepted to one party as a novice warrior, he patiently built up his career from there to being elite S-Rank adventurer, he was gifted the ability to travel through worlds by Lord Xephoernous