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Jhiday
(Don’t ask)
2021-09-13 08:06:08
This could be Those Who Hunt Elves, where the main characters drive around in a tank, and Airi (an actress) uses a variety of disguises, including a Nun at one point IIRC.

This one is really blurry. I only remember a few prom arts. They were featuring a tank set in a fantasy universe and one of the crew members was a nun. The visual style kind of resembled both Fullmetal Alchemist and Chrono Crusade
The thing is quite old. I remember seeing it somewhere around early '2000s.
Edited by sohibil