In the game あつまれどうぶつの森, フータ the owl's job is to evaluate fossils that the
player brings him. If you bring him a fossil that's already in the collection,
he will say that if he had enough money he would buy it from you:

> ま、それも かなわぬ夢なので
>
> とにかくこちらは お返しいたしますデス
>
> Well, that's just an impossible dream.
>
> Anyway, let me return this to you for now.

My question is: what kind of affectation is 〜ますです? In what speech register
would it even be appropriate? If it is appropriate in some speech register,
who typically speaks like this?

[![Text from
game](https://i.stack.imgur.com/6m7Dx.jpg)](https://i.stack.imgur.com/6m7Dx.jpg)
CC BY-SA 4.0
2020-07-18T21:56:08.883
78638
2020-07-19T00:58:43.023
816
question
grammar
「〜ますです」: is it correct, and what kind of speaker would talk this way?
ますです should be
[二重敬語](https://kotobank.jp/word/%E4%BA%8C%E9%87%8D%E6%95%AC%E8%AA%9E-684414)
as a grammar. お願いします or お願いです is a normal polite speech.

However, from my knowledge, I think the game, manga, novel, etc. characters
often say so adding the nuance of formality even if it is 二重敬語. It is
consensus that owls do not speak natural language, so writing です as デス implies
owls trying to speak Japanese somewhat awkwardly as a result of mimicking
natural language.

The discussion [Is おはようです just
weird](https://japanese.stackexchange.com/questions/63162/is-%e3%81%8a%e3%81%af%e3%82%88%e3%81%86%e3%81%a7%e3%81%99-just-
weird) also explains キャラ語尾 or how the です works in アニメ.
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answer