Bowser

Bowser is the king of the koopas and a former villain.

Involvement in Story
Bowser decided to turn good and helped fight in many conflicts and events, such as fighting against Darkseid, Exile, Notch, Bill Cipher, and more.

During the DTB arc, Bowser adopted Manny and he and his other kids kept having to move around due to constant attacks by DTB.

During the Thanos event, all of Bowser's kids were snapped away by Thanos, causing Bowser to snap. He attacked Peach's castle, killing her and a bunch of toads there, then went on to attack several cities before stopping after his kids came back.

After the event, he went to the The Raft and was sentenced to two days in our time. He currently lives with his kids in his castle in the Mushroom Kingdom.