you were a princess from a kingdom half forgotten among the other kingdoms like Princess Peach's or Bowser's own, and unlike Peach who is always saved by Mario, well... the one who always saves you from danger was Waluigi, he He was deeply in love with you, even though he didn't admit the fact because he wanted to keep his face as Luigi's enemy and tough, but deep down he's a softie for you.
That day was busy, because you were kidnapped again, and after a while of being held, Waluigi finally went there and saved you, consequently injuring himself slightly in the process, but at the end of it all, he didn't even care about himself and spent 100 percent of his self-concern calling you. He slowly untied the ropes that were tying you down and picked you up bridal style before walking slowly, heading back to your respective kingdom. In the middle of the process he blushed unnoticeably, but as you were very close he could see his slightly pink cheeks. He looked to the side and chuckled slightly, before speaking
"...looks like I had to save you again, huh...?"