Because of Grogu's relationship with Din, he simply couldn't justify leaving him to become a Jedi. Luke made it clear that Grogu would likely never see Din again if he chose to walk the path of the Jedi, and this was enough for Grogu to reprioritize his plan in life.
Grogu refused to be a part of Luke's Jedi Academy because Luke wanted him to forego attachments, like the old Jedi Order. That's on its way out, as the future of the Star Wars universe dictates. Grogu didn't want to give up his adoptive father, so he returned to Din on Tatooine.
In advance of the premiere, showrunner Jon Favreau clarified where in the Star Wars timeline The Mandalorian takes place. As part of that larger discussion, he revealed that Grogu spent as many as two years with Luke Skywalker before reuniting with Din Djarin.
Luke eventually settled on a forested planet where he started training Grogu. He also connected with Ahsoka Tano, who helped him set up a new Jedi academy.
It was believed that Grogu would eventually become a victim of Kylo Ren's destruction of Luke's Jedi Order. However, The Book of Boba Fett revealed that Grogu chose to follow the Way of the Mandalorian rather than become a Jedi, sparing him from Kylo Ren's wrath.
Why Grogu Leaves Luke Skywalker and The Jedi Explained - The Mandalorian Boba Fett
Why did Luke give Grogu an ultimatum?
The decision was meant to determine the course of Grogu's life -- as a Jedi or as a Mandalorian. At the time, Star Wars fans were appalled. They couldn't believe that Luke would be so stringent because most fans thought that he wouldn't be opposed to attachment.
Din Grogu (/ˈɡroʊɡu/), colloquially referred to as Baby Yoda, is a character from the Star Wars Disney+ original television series The Mandalorian and The Book of Boba Fett. He is a toddler member of the same species as the Star Wars characters Yoda and Yaddle, with whom he shares a strong ability in the Force.
At a mere 28 years of age, Luke is a baby compared to Grogu. This comes as a great shock as not only is he extremely strong with the Force, but Luke also has experienced a great deal of hardship, including watching his father sacrifice himself so that he may live — all before the age of 30.
As seen in The Book of Boba Fett, Luke taught Grogu valuable lessons and skills, but it was clear that Grogu's heart wasn't in it, causing Luke to give his new student a choice: a future as a Jedi through focused training or a chance to return to Din, which would bring an end to the teachings.
Luke Skywalker eventually had the lightsaber in his possession after Yoda's death in 4 ABY. Five years later, he offered the weapon to Grogu in a choice against obtaining beskar armor. However, Grogu chose the beskar armor over the lightsaber and went back to Din Djarin.
Grogu was trained as a padawan in the Jedi Temple, yet spent decades surprising his powers to survive. The Child spent a couple of years training with Luke Skywalker but chose to return to the Mandalorian. If Grogu completes his Jedi training, he will become the second Mandalorian Jedi.
Sabine's low level of Force sensitivity is acknowledged, but being a Jedi isn't solely about power. It is about committing to the Jedi Code and a way of life. Sabine doesn't need the Force to be a Jedi, which is why Ahsoka has chosen to train her once again.
In the episode, Mando and Grogu find the former Jedi Ahsoka Tano so that she can train him. Using the Force, she communicates with Grogu and reveals his name to Mando. Fans were conflicted about the name at the time, with some saying they'd rather stick to the Baby Yoda moniker.
What would have happened if Grogu stayed with Luke?
If he chose to remain with Luke and train as a Jedi, he would ultimately outlast Din Djarin. He'd then have to live several centuries with the weight of regret for not having seen Din Djarin off.
Is Grogu Yoda? According to the events of "The Mandalorian" so far, Grogu and Yoda are not the same character. They are simply from the same species. The name of this species has never been revealed since "Star Wars" creator George Lucas wanted to give Yoda a sense of mystery.
Yoda dies during Episode 6 which is set 5 years before The Mandalorian. And with Grogu being 50 in The Mandalorian, that puts Grogu's birth at around 45 years prior to Yoda's death. Gorgu is fifty when the Mandalorian takes place — that is five years after Endor and about as long after Yoda's demise.
Yes, in the Mandalorian, Grogu's age is revealed to be 50 in human years, Djin Djardin's age is never revealed but from the final scenes of the final episode of Season 2 of Mando, where Mando removes his helmet, an estimate of his age would be around 35-40 years. By the time of The Mandalorian, Grogu is 50.
Grogu's mother is either Yaddle or some other female member of Yoda's species, but he has no father. Because just like Anakin, Grogu was born off the Will of the Force, with no dad, and that explains why he's so powerful at an age that's considered an infant for Yoda's species.
Given that Grogu, Yoda, and Yaddle are the only known canon members of their species, it makes sense why some would try to draw a connection between the three of them. While Star Wars hasn't disproved the theory, it's highly unlikely that Yoda or Yaddle were Grogu's biological parents.
Grogu chose to leave Luke and the Jedi behind when presented with the opportunity. Luke told Grogu he could stay and continue learning with him, or he could accept the gift of a Beskar steel chainmail shirt Din left for him and reunite with the Mandalorian.
In The Mandalorian season 3, episode 4, the Armorer gives Grogu a rondel – a sturdy, circular piece of beskar that she has adorned with the mudhorn signet. In medieval times, rondels were circular pieces of metal that were often attached to breastplates, helmets, or gauntlets.
This makes perfect sense, as the end of The Book Of Boba Fett made it clear that Grogu had turned away from the Jedi Order for good. By choosing to leave specifically over a strong attachment, Grogu fully rejected the principles of the Jedi Order.
