Learn Japanese with Games - We Won’t Let You All Die Here!

Analysis

おにいさまができたみたいでとてもうれしかったですわ

おにいさま means “older brother” in a very formal way.

ができた is the past tense of ができる meaning “to get or gain something” when something comes into existence. It is different from the one with the meaning “to be able to do”.

みたい means “like” or “as if”.

This で means “because” or ”as” which links two sentences. The first sentence presents a cause or reason and the second sentence presents the consequence resulted by the cause.

とても means “very”.

うれしかったです is the past tense of うれしいです meaning “to be happy”.

わ adds feminine flavour to the sentence which is often used in anime.

あんたらをここでころさせやしない

あんたら is the plural of あんた meaning “you” in a casual way.

ここで means “here”.

ころさせる is the causative form of the verb ころす meaning “to kill”. AにBをころさせる means “let A kill B” and the A is カイナッツォ who is trying to kill them and the B is あんたら. So it actually means “let Cagnazzo kill you all” but Cagnazzo is omitted here so it means “let you all die”.

A stem of the verb + やしない or はしない means “won’t”. It expresses the speaker’s stronger will not to do something compared to the simple ない form.