Character Limericks

I recently played in a Larp that included a poetry mechanic. Limericks were specifically forbidden, so of course I have them on my mind and, well, this happened. I don't have enough distance from Reginald to feel confident about his, hence the multiple 5th lines. I'd appreciate some feedback on that one. Enjoy (if that's possible).

-- Alden

There once was a Martian princess Flew about in a pure sable dress

  Her foes she would smash
  But to free up her cash

Required romantic success

There once was a swift noble Knight Who brought darkest secrets to light

  He was clever and crude
  Insightful and rude

And a hell of a help in a fight

There once was a verdant haired lass With a body of copper and brass

  Though tiny in form
  She's the mistress of storm

And a wellspring of infinite sass

There once was a girl unrefined With a scalpel as sharp as her mind

  She left most of her suitors 
  Feeling they needed tutors

With her Knight she can finally unwind

There once was a changeable chap Followed his lord all over the map

 For true love back he came
 With a heavy new name

Our lass thinks him a lovable sap / But I told you all that in a rap / For his lady he's quite a sweet sap

There once was a terrible cad Loved a princess who most thought was mad

  Magic tarnished his name
  'Til he banished his shame

But for her he would still be quite bad