Japanese symbol for the English word in?

It is 'oni,' written: 鬼

英語: "Eigo." Eigo is the Japanese word for English.

Fat in Japanese is "Futoi". "Debu" is also used more in a slang way though

You may say 'heiwa,' written: 平和

Sasuke is not a word but a name, commonly used for ninja characters in fiction.