Ryoukai.
Osu! = Yes!/Roger!/Yes Sir!
Roger
It has a lot of different meanings but the main definition is "to finish"
It seems to mean that Jack's presence was drawing out the evil in Roger.
Deniva does not mean anything in Japanese.
"Olga" is not a Japanese word or name, so it doesn't mean anything at all in Japanese. Did you mean, "What is the name "Olga" translated to in Japanese?"
Kaitlyn does not mean anything in Japanese, but can be written in Japanese as: ケイトリン
The name 'Collin' does not mean anything in Japanese, but it can be written in Japanese as: コリン
This does not mean anything in Japanese.
It means "I understand." "Copy that" means the same thing.
It does not mean anything in Japanese, but it can be written: ビンセント
what does it mean in English and I'll find out what it means in Japanese for you