Merlin Wolford, a national hero in the kingdom of Earlshide, decided to keep a low profile while living in the woods with an orphan he saved. Shin, the aforementioned orphan, is actually a reincarnated Japanese businessman. Despite Shin's advanced abilities in both martial arts and magic, he is otherwise socially awkward and lacking common sense.¹
He joins Earlshide's magic academy and quickly becomes popular. Now, he must get used to life in the capital and fight off the evils that arise.¹
Magic and Violence
This anime contains violence,² specifically magical violence. We are told, according to IMDb, that in the show, a boy is turned into a "demonoid" and that during a fight, this boy is decapitated.³ I'm going to go out on a limb and say that there is no reason for a Christian to watch such things.
Scripture is clear that witchcraft/magic is not godly. We should not have anything to do with such wickedness. According to the Apostle Paul, witchcraft is one of the works of the flesh (Galatians 5:19-20). Witchcraft is fleshly, sinful, evil.
Demonic Activity
As mentioned before, there is a boy turned into a "demonoid".³ There are several different demons within this show.⁴ No one should see this and think that this is godly. The Bible tells us that there are spirits that have gone out into the world, and their works are evil.
With that in mind, we should not be consuming media depicting these wicked creatures and their sinful works! Thus, demonic possession and other forms of demonic activity are contrary to scriptural media boundaries.
Immodesty
Crunchyroll says that there is "Sexualized Imagery" contained in this anime.² This includes:
"The female student uniforms show a lot of cleavage."
"At the end of episode 7[,] there is a scene of the characters in a public bath. ... girls are seen with only their nipples covered and the rest of their bodies exposed."³
Anime, as a whole, is filled with so many scenes like this. It's as if "casual immodesty" isn't enough—they need to uncover women as much as they're allowed to so they may satisfy some sinful urge I suppose. Whatever the reason, one thing is clear: this is immodesty.
1 Timothy 2:9 tells women to dress in modest apparel. Yet, this show reveals female characters in ways in which they shouldn't be. Therefore, we can conclude that this is ungodly and is to be avoided.
"And, behold, there met him a woman with the attire of an harlot, and subtil of heart." (Proverbs 7:10)
Profanity
Lastly, we learn that this anime contains profanity.² Such language is directly against Scripture. The Bible tells us that we are to speak words that edify the hearers (Ephesians 4:29), not filthy words (Colossians 3:8). Let us heed the Scriptures and forsake these perverse lips (Proverbs 4:24).
"[23] Keep thy heart with all diligence; for out of it are the issues of life. [24] Put away from thee a froward mouth, and perverse lips put far from thee." (Proverbs 4:23-24)
If we want to keep our hearts pure, to keep them with diligence, then we are to keep the filth out. And one way we do that is by keeping the perverse lips—lips which use filthy communication—away from us. Let me ask you: Would it be considered putting away perverse lips if you don't prevent yourself from hearing them? We should avoid listening to things (in this case, an anime) that contain profanity.
Conclusion
Why would Christians sit and watch a show with witches in harlots' attire? Christians should not be involved with this anime or any like it! We are to keep ourselves "unspotted from the world" (James 1:27). The verse I just referenced tells us that there are two aspects to pure, undefiled religion: that it helps the fatherless and widows, and that they keep themselves unspotted from the world.
Do you want pure religion? Do you want undefiled religion? If so, you are to keep the world out of you. You ought to be in the world (as a testimony for the Lord), but the world shouldn't be in you!
Sources:
1. "Kenja no Mago." MyAnimeList, myanimelist.net/anime/36407/Kenja_no_Mago. Accessed 12/16/2025.
2. Wise Man's Grandchild. Crunchyroll, crunchyroll.com/series/G63K95846/wise-mans-grandchild. Accessed 12/16/2025.
3. "Wise Man's Grandchild Parents guide." IMDb, imdb.com/title/tt9828724/parentalguide. Accessed 12/16/2025.
4. "Demon." Kenja no Mago Wiki, kenja-no-mago.fandom.com/wiki/Demon. Accessed 12/16/2025.