Beast (, ビースト, Bīsuto)[5][7][6] is a transformation utilized by Gohan. It was given its name by Piccolo.[2] The Beast form is unique to Gohan outside of Dragon Ball Xenoverse 2,[8] and when utilizing the form he is referred to as Gohan Beast[9] (孫そん 悟ご飯はん・ビースト, Son Gohan Bīsuto).[8] Toriyama stated that the name comes from the sensation that "the wild beast. Well the supreme kai's also have white hair.
And gohan did unlock mystic form from the elder kai in dbz. Maybe the white hair represents divine power? Merged Zamasu also has white hair being a kai and so do the attendants like Whis. Gohan Beast's hair is similar to Goku's Ultra Instinct form and is gray.
His blue electricity is joined by purple electricity in this form. The appearance of Gohan Beast resembles the original Super Saiyan 2 transformation, especially in the extra large hairstyle. His hair turns a light gray, just like Ultra Instinct Goku and the color of the Supreme Kais, a reference to how he got his Ultimate form.
Another defining trait of the hair's appearance is the single large bang that reaches past his face. His eyes also become entirely. The new form that Gohan achieved is called Son Gohan Beast, or simply the Beast Form.
In this form, Gohan has red eyes with black pupils, while his eyebrows and hair turn into a silvery grayish color. Beast Gohan The beast Gohan is a transformation akin to the transformation into Super Saiyans. The Saiyans get their power through grief and anger and this form was the same.
During his battle with Cell Max, Gohan witnessed the death of Piccolo. He got engaged after that and started to switch forms. His eyes started flashing rapidly before settling on a red color with black pupils.
His hair. Appearance: In the Gohan Beast form, Gohan's hair grows long and turns silvery-white while his eyes glow red. This gives him an intense, almost supernatural look distinct from other transformations.
This could explain why Beast Gohan isn't considered a Super Saiyan form, neither Broly's Ikari, because they doesn't belong to the know casual Saiyan transformation system and evolution, and God forms as well. Gohan trying to go SSJ2 could also explain why when he goes Beast, it looks very similar to when he tranformed into SSJ2 for the first time. The last shot, right before him and Piccolo turn back to normal, really shows how stupidly long Gohan's hair is in Beast form.
They should've stuck to just the eye recolor IMO. The color of the hair reminds us of the silence of the unconscious play, but the unconscious play is described as white-silver, and the Beast is also portrayed as gray in figures and media illustrations.