You expect a country of Buddhists and Shinto to make a Christian anime?
There’s Evangelion, which is closer to how we Westerners take Buddhist holy texts and say random techno-mumbo-jumbo in our SciFi stories (ex: Stargate).
Similarly, Angel Beats takes the Christian idea of Purgatory except it’s all Buddhist / Zen enlightenment based because Japan doesn’t get Christianity lol.
There is Death Note, where some characters are explicitly Catholic and a few Christian references pop up kind of elegantly. (L washes the feet of Light Yagami for example). I wouldn’t call the plot especially ‘Christian’ otherwise but this does deserve mention as an Anime that at least got the meaning behind the Christian references they chose.
Digimon Season 1 might be the closest thing to Christian. Kids get powers as they invoke the power of Virtues like Courage or Faith. Two Digimon turn into literal Angels and one of the bad guys is ‘Devilmon’, who was weak to the angel Digimon. Season4 has a fallen angel named Lucifer (well… Lucemon. All Digimon have a -mon on the end) who goes evil as well. Season4 is more random / less elegant with the Christian references as Cherubimom and Seriphmon (angels) don’t really represent Christian ideas anymore IMO.
But Season1 Digimon was the closest you’ll get IMO
But this is really rare. Christianity is treated as an exotic religion / weird Character trait more often than not (much like random Buddhists show up in Hollywood to round out a cast or add a bit of exotic flair).
I dunno. Hellsing Ultimate? Irish Catholic priest is pissed off at a Protestant Vampire who works for the Queen in the 1990s… is referencing ‘The Troubles’ too soon?
Obviously not a Christian story given the huge amounts of hyperviolence. But the Christian references were at least kinda-sorta correct…
Chrono Crusade is a Miko x Yokai adventure story except the Miko is a Nun and the Yokai is a “Demon”.
Mikos are known to use archery to defeat Yokai. No wait, its a nun and westerners use guns, right? And they meet all kinds of Yokai… like good yokai, bad yokai, friendly yokai. No wait, western culture doesn’t have Yokai, they call them Demons. So good demons, bad demons, friendly demons…
Nothing wrong with that :-) Switching up the setting is fine but its not especially “Christian” in theme.