Wise Man’s Grandchild is a Japanese light novel series written by Tsuyoshi Yoshioka and illustrated by Seiji Kikuchi. It began serialization online in January 2015 on the user-generated novel publishing website Shōsetsuka ni Narō. It was acquired by Enterbrain, who have published eleven volumes since July 2015 under their Famitsu Bunko imprint. A manga adaptation with illustration by Shunsuke Ogata began serialization on Kadokawa Shoten’s Young Ace Up website from March 2016. It has been collected in thirteen tankōbon volumes. An anime television series adaptation by Silver Link aired from April 10 to June 26, 2019.
A Japanese salary-man who worked for a science textbook publisher, was killed by a truck and reborn into another world with his memories intact. Raised and trained by Merlin Wolford, Melida Bowen, and Michel Collins, thereby making his magical and combat skills beyond S-rank. Shin can also create and modify magical gear to what can be considered National Treasure level equipment. Being raised in the woods, however, his social and worldly skills are a bit lacking. He has the leadership of his own Ultimate Magic Research Society and obviously tops S-rank. Sicily was enamored with Shin from their first meeting and is overjoyed when she becomes his fiancée. Like his grandfather, Shin can cast magic without verbal or somatic components (since he considers aloud spell names embarrassing) and has created many unique spells like the gate and extra-dimensional storage spaces. His element compress in water & heat and his strongest arsenal is Hydrogen Bomb. Based on the recollection of his previous world, Shin’s knowledge of science and astronomy revolutionize the world’s magic tools. Over the summer break, Shin and his grandparents did intensive training with the Ultimate Magic Research Society to prepare for massive demon outbreaks while deployed in a special unit called the Ultimate Magicians, hopefully, to prevent other students from getting conscript into war. Soon afterward, Shin’s (Earth-modern) appliances prompted him to open his own shopping mall. His title is Demon Lord, which he does not like.
August von Earlshide
The son of King Diseum and the crown prince, he also goes by “Aug” or “Gus” to his friends. He is respected by his peers and, like his father, considers one’s abilities to take precedent over their peerage, but does not use his influence unless necessary. Aug inherited his father’s traits. Shin and Aug have a cousin-like relationship. Aug enjoys watching when Shin gets in over his head during social actions and likes to manipulate Shin to act on his plan. He also keeps Shin prudent from introducing new magic and tools that would throw the world out of balance. Aug’s childhood friends, Julius and Thor, feel pressured because he talks to Shin casually. Even Elizabeth is irritated by their closeness until Aug ease her mind when he provokes Shin to confess to Sicily. He acquired the title ‘Thunder God’ after electrocuting a giant crocodile and is the 2nd S-rank.
Maria von Messina
A red-haired second daughter of a Countess and is a friend to Sicily. Maria is a very upfront and vocal lady; she is also an obsessive fangirl of Merlin and Melida. She teases Sicily over her crush on Shin and tries to offer her support in their relationship. Due to her indifference, Shin does not treat her like a nobleman’s daughter. Her title is Valkyrie and is the 3rd S-rank. She does not like her title as it implies she will be a virgin for the rest of her life and never get married.
Sizilien “Sicily” von Claude
A beautiful, timid; soft-spoken blue-haired girl being called a Saint, and is the third daughter and fourth child of the Viscount Claude, who works at the Finance Bureau. Sicily is unassuming with what many consider the loveliest features. She is smitten with Shin the first time she meets him after he rescues her and Maria from a group of thugs. As she and Shin started going out she tends to be a little aggressive towards him and others. Sicily excels in healing magic and thanks to Shin’s tutoring her forte is now only second best to Shin’s. She is the 4th S-rank and received the title ‘Holy Maiden’ for being a savior of Swedes Kingdom civilians increasing her popularity, including her and Shin’s engagement. She’s now targeted by Zest and his scouts, as she is deemed to be Shin’s weakness.