Hang Kasa

Hang Kasa, or known as Tok Kasa by BoBoiBoy in BoBoiBoy Movie 2, is the Ruler of the Crystal Element. He holds the power of the tier-3 Crystal element, after Earth and Quake as he said.

Early Life
As he mentioned in BoBoiBoy Movie 2, he and Retak'ka were best friends when they were kids. After they each found GammaBot and CrystalBot (Retak'ka taking GammaBot and Hang Kasa taking CrystalBot), together they become unbeatable in battles but for Retak'ka it was not enough. Retak'ka became greedy and turned to villainy.

100 years prior to BoBoiBoy Movie 2, Retak'ka is seen fighting Hang Kasa in his Crystal armour somewhere in the galaxy. Their battle ends when Hang Kasa using his power to encase Retak'ka in crystal, then using Ochobot to absorb and store Retak'ka's powers (which leads to Ochobot giving BoBoiBoy his powers). After the event Hang Kasa start living in Planet Quabaq.

BoBoiBoy Movie 2
He is first mentioned by Koko Ci, who orders BoBoiBoy to find him at his home after Retak'ka's attack destroys TAPOPS Station. He trains Boboiboy and Gopal to help them defeat Retak'ka after the villain stole BoBoiBoy's elemental powers (except for Earth, Fire, and Water).

After completing the training, Hang Kasa steals BoBoiBoy's Quake powers to wield his Crystal form once more and defeat his old friend. However, presumably due to his age, Retak'ka easily defeated him and absorbed the element. He gives a powerful speech to BoBoiBoy, motivating him, before Retak'ka seemingly kills him. This enrages BoBoiBoy enough for him to unlock Elemental Fusions for the first time, combining his remaining elements to become BoBoiBoy FrostFire.

He later reveals to Gopal that he was still alive, having only been knocked unconscious by Retak'ka's attack. In the movie's epilogue, he narrates how the elements are safe with BoBoiboy, only for the latter to discover he was still alive. The two then share a heartwarming reunion.

Powers

 * Power Sphere CrystalBot: The Power Sphera he found when he was young and used it for good.
 * Crystal Armor: By using the Power Sphere CrystalBot, he can turn it into a armor made of crystals for battle. His name has been mentioned in the comic BoBoiBoy Movie 2 - The Evolution of Power.
 * Crystal Shield: Serves as a defensive weapon for Hang Kasa.
 * Crystal Shield Throw: Hang Kasa throws his shield towards Retak'ka to divert his attention so that he can launch the next Crystal Shield throw. The name of this technique is mentioned in the comic BoBoiBoy Movie 2 - The Evolution of Power.
 * Crystal Spear: Hang Kasa's weapon which he used to freeze Retak'ka in battle 100 years ago. Its name is also revealed in the comic BoBoiBoy Movie 2 - The Evolution of Power
 * Crystal Barrier: A defense technique for Hang Kasa by raising the crystals to protect himself. This technique is similar to Earth Barrier.
 * Crystal Keris: A long keris with a pattern of sharp crystals. This weapon is used in the comic BoBoiBoy Movie 2 - Evolution of Power.

Trivia

 * The name 'Hang Kasa' is a mix of words of "Hang" (a title for men in the past, for example Hang Tuah) and "angkasa", which means 'space' in Malay.
 * He is the third character to tell people to call him 'Bro' in the BoBoiBoy franchise.
 * the first being Bagu Gu and the second being the Shield Monster.
 * He is funny but also quite knowledgeable in many things.
 * Hang Kasa is called Tok Kasa by BoBoiBoy as he is currently old when BoBoiBoy finds him.
 * He told BoBoiBoy to call him 'Bro' when he asked what to call him. However, Hang Kasa told BoBoiBoy that he was just joking around.
 * reflecting that old people like to joke around with young people.
 * Hang Kasa's transformation style wearing his crystal armor is similar to Kamen Rider's transformation style from the titular series.
 * Guru Gaharum is a former friend of his.
 * He originates from Planet Gugura.
 * Hang Kasa's favorite food is flour-fried kale while his favorite drink is Planet Quabaq drink.
 * Hang Kasa's favorite type of song is rock.
 * Hang Kasa's favorite color is green.