Peach

Princess Peach is a major protagonist in Smash King.

1st Incarnation
Before the start of Raccanto this version of Peach wanted to breakout of the cycle her past iterations set. So she let herself get captured by Bowser only to usurped him, take over his kingdom and from her own army. Over time she managed to figure out a way on how to kill a trophies with no chance of reincarnating, by taking apart their matrixes. Somehow Peach was killed and was reincarnated.

(Brawl)2nd Incarnation
This Peach was like every other before her, but slowly started to warm up Bowser as he was in a team with Mario and Roy.(the rest is unkown as Raccanto isn't complete)

Brawl
Peach and everyone else was then transported to Brawl, but realized that Mario isn't with them leading to Peach and everyone that like Roy Mario couldn't be reincarnated this time. This lead Peach into realizing that by letting Mario do everything for her she was help less leading her to become stronger that than she ever was.

Act 1
In the beginning of the series Peach fought Bowser as he was trying recruit some members for his team and as she was beaten she decided to join him along with Meta Knight. As she and the others were in a winning streak she and Meta Knight were then attacked by Link and Lucario leading towards Link beating her and Meta Knight and taking Bowser leading them to find him, but was then ambushed by DK's Team. She was rescued by Bowser causing her to feel like she's regressing and run away from Bowser. Until Dedede talked to her and helped with her insecurities leading to her forgiving Bowser.

Act 2
As Peach was about to start training she was summoned by Dedede to help give her edge to keep up with Bowser by giving her the Starod. Over the past few days she decided to visit Zelda along with Meta Knight who shared poetry with her overheard Zelda and Samus talking about taking Bowser away causing her to sent Meta Knight to follow Samus as she talked to Zelda. After hearing about what Samus' group wants to do to Bowser she and zelda ran all the way towards Bowser bumping into Wario on the way telling them what he and Meta Knight heard. Peach & the others managed to get towards Bowser and told the others to give her time to help save Bowser, while in the middle of her saving him she was almost killed by Ganondorf causing Mario to spring into action. And as she saw Mario still having his fascade on she told it's okay to be himself causing him to give her enough time to save Bowser leading towards him making Ganondorf retreat. Over joy with have most of the old gang back together started to making her wonder if she Roy was still out, but confused with why Bowser attacked Mario with Mario reveling what really happened in Melee causing her and the others to help stop the fight. After stopping not just the fight as well as Samus' group's own kidnapping of Bowser she and others were then charged up by Bowser's explosion, after he was imprisoned Dedede she and Meta Knight learn about the 1st Peach in Melee. And after hearing about Bowser's sentence she,Meta Knight and Bowser joined back together to help him.

Trivia

 * Peach is one of the few characters that tried break away from their past iterations. Like 1st incarnation(Melee),Bowser and Link.
 * Her and Link are the only ones to have become villains in some point in their past lives.