Malvaron Grimm is a main character of Mysticons. He is a young talented male astromancer who is stationed in the Palace. He becomes the Mysticons' new instructor on how to fully master and utilize their Mysticon abilities and weaponry to their very strongest.
He is known to have romantic feelings for Arkayna and starts dating her after the destruction of Necrafa and the Spectral Dragon, in Episode 28.
He is voiced by Mac Heywood who also voiced Winston Setinburger in Winston Steinburger and Sir Dudley Ding Dong and Woody in 3 Amigonauts.
Malvaron is a tall guy with brown skin and black hair. He wears a jacket and a shirt with the Astromancers symbol on the front of it.
Malvaron is a very loyal friend. He is patient with the Mysticons, often offering advice and guidance to the girls as their assigned mentor.
Malvaron is one of the Astromancers, and the first of them to arrive after Queen Goodfey's summons. In episode thirteen, his loyalty to the Mysticons was questioned by Arkayna and the other Mysticons when he agreed with the Astromancers that the Dragon Disk should be destroyed. However, he later reaffirmed his loyalty to the Mysticons by helping Arkayna use it in an attempt to free her parents from Dreadbane's curse of bone.
- Magical Aura: As a mid-level Astromancer, his star magic is colored a light orange, the same as his aunt Geraldine Yaga, though at times it turns a dark purple when he uses high-level star magic.
- Stellar Magic: Like his ambitious older sister, Malvaron is extremely strong and talented in the use of immensely powerful star magic used by the Astromancers on all various power-levels. He can cast a simple tracking spell to find people from a great distance, and erect a strong shield out of orange-colored energy for protection.
- Object Creation: He cast a nonverbal spell to make up a formal green dress for Arkayna in the end of Episode Three, and eventually presented her with a red-orange flower he created for their very first date in Episode 28. He managed to create a snow-globe, in which he imprisoned his elder sister for her ambitious crimes against the realm.
He and his elder sister do not get along well, and she even tried to kill him in "How to Train a Mysticon". Overall, their brother-sister relationship is very strained.
Arkayna and Malvaron have a very close relationship. Although Arkayna can be stubborn at times, Malvaron patiently helps her to master her powers, serving as both a mentor and a dear friend. The two are often seen together combining their magical powers during various missions, such as in episode nine and episode thirteen. In "All Hail Necrafa]", Arkayna was deeply hurt by Malvaron's disloyalty towards her and the other Mysticons, but Malvaron later reassured Arkayna that he wanted to help free her parents from Dreadbane's curse. In "Quest of the Vexed", it is confirmed that Malvaron has a crush on Arkayna when it is shown that the password of his spell-pad is"Arkayna".
In "The Dragon's Rage", Malvaron is seen dancing with Arkayna in the party held after Necrafa and the Spectral Dragon were destroyed. He officially starts dating her in "Save the Date!", which their very first date is ruined by the arrival of a makeup bloop called "Oozie Q" who has Arkayna's romantic feelings for him. He and Arkayna then seal their romance by sharing their very first kiss.
- Malvaron is voiced by the same voice actor who also voices Dreadbane.
- His magical aura is a light orange, same as his aunt's. At times, it changes to a dark whitish-purple when he is using top-level star magic.
- He is left-handed, as revealed in "The Mask."
- Romantic nicknames for him are "Malvy- Walvy" and "Malavaroonie" by the makeup blob Oozie Q.