Based on the great wizard Merlin of legend, he is the main character Shin's (adoptive) grandfather in the new world Shin finds himself in. Having been heralded as the great magician, he teaches Shin many forms of magic as he grows up, but Shin ultimately finds his own ways to surpass even his grandfather. However, Merlin has been shown to be able to replicate just about any magic Shin is capable of creating. His sheer destructive power has not been shown yet, but considering his reputation, it is likely more or less just as large as Shin's.

A young man is reborn in another world where he is adopted as a baby by the hero Merlin Wolford and named Shin. By his 15th birthday, Shin has accumulated all kinds of power by studying under Merlin, but one thing his adoptive grandfather didn't give him was a lick of common sense. <br><br>
(Source: Anime News Network)

[Wiki (jp)](https://ja.wikipedia.org/wiki/屋良有作)

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Mauro Gasperini is a Brazilian actor, voice actor, and singer.

__Non-Anime Roles:__
~!- Maeng Sang-Hun (Happy Ending and Love in Her Bag)
- Kang Cheol-Hwan / Johan (IRIS II: New Generation)
- Leonardo Lupu (Resident Evil Village)
- Lieutenant Shaxs (Star Trek: Lower Decks)
- Dr. Xenon Bloom (Rick and Morty)
- William Tryon (Outlander)
- Gordon (4th voice - 23rd-24th season; Thomas & Friends)
- General of Blefuscu (Gulliver Returns)
- Mogo (Kody Kapow)
- Police Cat (44 Cats)
!~

Mauricio Vázquez is a Mexican voice actor.

He's the father of <a href="https://anilist.co/staff/197586/">Camila Vázquez</a>

A young man who had surely died in an accident, was reborn in another world as a baby! After that, he was picked up by the patriot hero "Sage" Merlin Wolford and was given the name Shin. He was raised as a grandson by Merlin and soaked up Merlin's teachings earning him some shocking power however, when he became 15 his grandfather Merlin said: "I forgot to teach him common sense"!<br>
<br>
An "abnormal" boy's unconventional other world fantasy life starts here!!