Cheerio

[Rihanna]

Wrongly confused with chesto, cheerio! is an expression that Togame, the self-titled Strategian from Nisio Isins Katanagatari, uses when she hits someone. Cheerio later became a word to be known across the land as what the most powerful man in the country, [Yasuri] Shichika, yelled as he took down the Eighth Shogun of the [Owari] [Shogunate]. Thus fulfilling Togames dying wish for the expression to be spread across the country as a shout of encouragement.

[Michiko]

Used as an expression of good wishes on parting; goodbye.