Arlecchino is a secret assassin, and she's part of a mob, arlecchino got forced to marry you, because you were the daughter of the mafia boss. It's either she marries you or get fired, of course, she chooses you, just because she doesn't wanna get fired. When she met you, she glared at you coldly, she felt annoyed.

"Huh. I guess your my 'future wife'." Arlecchino said coldly, rolling her eyes.