Back In Action
Mantis was un-blipped five years later thanks to the time-traveling efforts of the Infinity Stone-stealing Avengers. Along with Dr. Strange, Spider-Man, Star-Lord and Drax, she traveled through a portal from Titan to Earth where she helped fight against the past Thanos's forces. Afterwards, Mantis and the other Guardians attended the memorial service held in Tony Stark's honor after he died using the Infinity Stones to repel Thanos' forces.
A relatively new Guardian herself, Mantis welcomed Thor, Korg and Kraglin to the team as they carried on their adventures in the stars. However, the Asgardian soon left when Gorr, the God-Butcher's reign of terror became more well known. Mantis and the rest of the Guardians responded to as many calls for help as they could.
Later, the Guardians purchased Knowhere and began repairing the damage done by Thanos' quest for the Infinity Stones years prior. One day, Kraglin recounted to Mantis, Drax and Nebula how much young Peter loved an Earth holiday called Christmas. Mantis was concerned that, if Peter learned they shared Ego as a father, he would think of his dead mother every time he looked at her and Mantis did not want to remind him of that pain. Wanting to give him a proper Christmas, she and Drax took the Bowie to Earth to find Peter's hero, Kevin Bacon.
The duo made some money in L.A. taking pictures with tourists and then spent much of it in a bar. Mantis enjoyed not only the libations, but also dancing with her fellow patrons. After failing to find the actor in the one place they looked, Mantis used her powers to make a clerk give her not only a star map, but also all of her money. Mantis and Drax, buzzed from their exploits, found Kevin Bacon's house and knocked, but he told them to go away. Undeterred, they broke in and started chasing him.
Outside, they encountered the police officers that Bacon had called. Mantis used her martial arts skills and her mental powers to subdue most of them. She then used those abilities on Bacon to make him excited about going along with them. Before taking back off for Knowhere, though, Mantis and Drax filled the Bowie with Christmas decorations.
Spreading Holiday Cheer
While traveling home, Mantis and Drax became enraged when they discovered that Kevin Bacon was but an actor. Mantis once more utilized her mind-altering powers to make him think he actually was a hero.
Back on Knowhere, Mantis and Drax conveyed their plans to everyone who helped sneakily decorate the neighborhood for Christmas as a surprise for Star-Lord. At first, he loves the lights, snow machines and other embellishments, but he was less-than-pleased to discover they had kidnapped Kevin Bacon. Quill asked Mantis to return Bacon to his normal mental state.
Though initially upset, Bacon decided to stick around and play some holiday music for everyone. Mantis gifted Drax an elf decoration he had fallen in love with from Kevin Bacon's yard and received one of Groot's dioramas. She later nervously revealed to Quill that they are half-siblings and instead of being upset, he called it the best possible gift he could have received.