A demon named Jahy became child-sized after she lost her powers to a magical girl.¹ The mana crystal was destroyed, the same crystal that powered the Dark Realm, where Jahy was second strongest.² She plans to fix the mana crystal and empower the Dark Realm once more.² However, whilst she does that, she needs a place to eat and sleep, which forces her to get a part-time job to pay rent.²
Sexual Content
The Great Jahy Will Not Be Defeated! has sexual content and immodesty in it.³ Examples include Jahy's "powerful form" wearing revealing clothes.⁴ Additionally, Jahy wears braids, and her nakedness is seen, since she's wearing a shirt that reaches to her upper/mid thighs.¹
Let's consider what the Scriptures say about clothing. Jahy is a humanoid figure, and yet, as mentioned, she is not clothed properly. The Bible commands women to wear modest clothing (1 Timothy 2:9). Jahy doesn't, and of course, this is contrary to Scripture.
Proverbs tells us of a certain type of clothing known as the "attire of an harlot" (Proverbs 7:10). There is clothing that is inherently immodest and some that is modest. But Jahy isn't wearing the modest dress, she is wearing the attire of a harlot.
The Hated of God
The Lord tells us in His Word that He hates those who take pleasure in violence.
"The LORD trieth the righteous: but the wicked and him that loveth violence his soul hateth." (Psalm 11:5)
This is powerful language, and brooks no argument. Since this anime contains violence,³ magical fights, if someone enjoys watching it, the Bible says God hates them. Such content is against the Scriptures, regardless of the viewer's enjoyment or lack thereof.
In Genesis, one of the reasons it says God destroyed the world was because of their violence. Genesis 6:11 says:
"The earth also was corrupt before God, and the earth was filled with violence." (Ibid.)
If the Lord is willing to destroy the world for violence, why would He be okay with His children enjoying the same thing that grieves Him?
Perverse Tongues
God admonishes us through His Word, revealing that we have something to guard. He then tells us ways to protect this thing. Let me reveal this thing to be guarded using what the Scripture says:
"Keep thy heart with all diligence; for out of it are the issues of life." (Proverbs 4:23)
We are to keep, or protect, our hearts! Why, though? It's because the goings-out of life come from the heart. So, how does the Lord want us to protect our hearts? One way is explained in the very next verse.
"Put away from thee a froward mouth, and perverse lips put far from thee." (Proverbs 4:24)
Please, reader, reread that verse again, maybe read the two together. It says, as plain as day, to put the froward mouth and perverse lips far from us. When one takes the passage for what it says, it becomes abundantly clear that the LORD's will is for us to not watch anime (like The Great Jahy Will Not Be Defeated!) that contain profanity and perverse talk.
Defiling Wine
Sadly, there is also alcohol and drunkenness.⁴ The Bible reveals to us that such things are not alright.
"And be not drunk with wine, wherein is excess; but be filled with the Spirit;" (Ephesians 5:18)
Drunkenness
is the opposite of being filled with the Spirit of God. Yet, often,
Christians think it is fine to consume media depicting being drunk. If
being drunk with wine is not being filled with the Spirit, then there is
no Spirit of God in this anime.
This leads into the next section. If the show does not have the Spirit of God working for it, then what spirits are using this show to push their agenda?
Zoroastrian Demonology
Jahy is a Zoroastrian devil. In Zoroastrian thought, there is a demoness of lust named Jahi. Now, Jahy in this show wears clothing that is revealing, especially when she is fully powered. Taking this into consideration, I don't believe it is a stretch to connect Jahy and Jahi.
Jahy's Japanese name is ジャヒー (jahī), which is the Japanese transliteration of Jahi, according to Jisho.org.⁵ As such, the Jahy–Jahi connection is baked into the Japanese. It is alarming that an anime would have its protagonist be a Zoroastrian demoness, isn't it?
And before someone accuses me of stretching the situation, it is worth mentioning that there are two other demons named Druj and Saurva—two more demonesses from Zoroastrianism!
When someone lets this anime into their house, they are inviting demonic activity into their life. The Bible says that we are not to even touch the unclean things (2 Corinthians 6:17). You have two choices: drink the cup of the Lord or the cup of devils, to be a partaker of the Lord's table or of the table of devils (1 Corinthians 10:21). Which will you choose?
Conclusion
"Neither shalt thou bring an abomination into thine house, lest thou be a cursed thing like it: but thou shalt utterly detest it, and thou shalt utterly abhor it; for it is a cursed thing." (Deuteronomy 7:26)
This is a show containing abominations. As such, this anime is one of those things we are directly commanded not to bring into our houses. May the Lord help us be submissive to His will and Word, that we might put away the abominations from our houses!
Sources:
1. "Jahy." The Great Jahy Will Not Be Defeated! Wiki, the-great-jahy.fandom.com/wiki/Jahy. Accessed 10/4/2025.
2. "Jahy-sama wa Kujikenai!" MyAnimeList, myanimelist.net/anime/48753/Jahy-sama_wa_Kujikenai. Accessed 10/4/2025.
3. The Great Jahy Will Not Be Defeated! Crunchyroll, crunchyroll.com/series/GNVHKNWXW/the-great-jahy-will-not-be-defeated. Accessed 10/4/2025.
4. "The Great Jahy Will Not Be Defeated! Parents guide." IMDb, imdb.com/title/tt14470072/parentalguide. Accessed 10/4/2025.
5. "ジャヒー." Jisho.org, jisho.org/word/518697a3d5dda7b2c604bfd3. Accessed 10/4/2025.