Who said "Solitude is where all great plans are made."?

This quote is attributed to Mandy.

Solitude is where all great plans are made. - Mandy

"Solitude is where all great plans are made."

Mandy Solitude

"I'm not your friend. I'm your leader."

"Happiness is for the weak."

"You will obey me."

"I don't have time for your nonsense."

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."