Grogu is a male Force-sensitive Mandalorian foundling that belonged to the same species as Jedi Grand Master Yoda and Jedi Master Yaddle. Grogu was born in the year 41 BBY, and was raised at the Jedi Temple on Coruscant. Grogu was eventually held at a hideout run by Nikto mercenaries on Arvala-7 during the New Republic Era, having survived the siege of the Jedi Temple decades prior.
While still an infant at the age of fifty years, he was sought, on behalf of Moff Gideon, by an Imperial who hired Mandalorian bounty hunter Din Djarin to retrieve him. However, Djarin chose not to leave Grogu with the Imperials and rescued him from the Imperial remnant facility.
After attempting to hide with Grogu along the fringes of the galaxy, Djarin returned to Nevarro to deal with the Imperials chasing Grogu in hopes of keeping him safe. In the process, Grogu became a Mandalorian foundling and the single other member of Djarin's newly created clan. As a result, Djarin took up a new mission: to deliver Grogu back to the Jedi.
Djarin, alongside Grogu, would then travel across the galaxy, searching for the few remaining Jedi who were left. As advised by former Jedi Ahsoka Tano, Djarin would eventually travel with Grogu to Tython, where he could reach out through the Force to find another member of his kind. However, Grogu was captured by Gideon's Imperial forces, and Djarin was forced to lead a mission to rescue him. After being reunited with Grogu, Djarin delivered him to Luke Skywalker, a Jedi who agreed to take the child into his care and train him in the ways of the Force.
Grogu's diet is influenced by his taste for a variety of meals, including living creatures. In his time with Djarin, Grogu sipped bone broth and ate chowder, as well as devoured frogs, unfertilized frog eggs, a spider egg, creatures with tentacles, and cookies.
In addition to being carried in Mando's satchel and riding shotgun in the Razor Crest, Grogu had his own hovering pram that he used to get around. It was egg-shaped with a closing cover, fashioned out of metal by the Ugnaught Kuiil specially for Grogu. Djarin used Kuiil's capsule to transport Grogu until it was ripped open by Koska Reeves so she could retrieve Grogu after saving him from a Mamacore.
Grogu is able to channel the mystical energies of the Force on account of being Force-sensitive. One notable display of his power was when he telekinetically lifted a giant mudhorn into the air for a brief time to save Djarin from the charging beast. However, performing this feat was very strenuous for Grogu as he subsequently fell unconscious for several hours afterward. He can also use the Force when he becomes angry, such as when he telekinetically strangled Cara Dune because he believed she was harming Djarin while they were arm-wrestling. Grogu revealed his ability to heal serious injuries and even cure poisoning by touching the injury and then using the Force, though the act (much like levitating the mudhorn) was incredibly draining. In another notable display of telekinesis, Grogu created a strong barrier using the Force to protect his companions by both blocking and redirecting a stream of fire from an attacking Incinerator Stormtrooper. Grogu had grown more skilled in his use of the Force by the time of his capture on Tython. By then, he was capable of tossing around two Stormtroopers with telekinesis until his Force powers ran out. He could also manipulate small, nearby objects with ease, such as pulling cookies towards himself or unscrewing a knob from one of the Razor Crest's levers, which then became his favorite toy.