Getter Robo Arc has a noticeably more menacing appearance compared to earlier models. Its naming and design are meant to invoke a Buddhist deity with each forms name containing a Sanskrit character that is the seed syllable of the deity they represent. Arc (āḥ) comes from Vairocana, Kirik (hrīḥ) comes from Amitābhaḥ, and Khan (hāṃ) comes from Acala. All forms are capable of flight in one form or another. Its combat prowess can be roughly compared to Shin Getter Robo (before it was infused with Getter energy from Shin Getter Robo G), and its energy output is much more stable. That being said, there are still limits to Arc's abilities, as it was losing to Bug and (only in the anime) almost lost to Uzahra.
Although, as per usual, three pilots are needed to fully unfold its combat potential, Getter Arc is shown to be piloted by Kamui alone, and, later, only by Takuma. In the anime, Takuma even freely alternates between Arc's three forms.
The primary form which corresponds the most to the old Getter Robo models. It has a ferocious fighting style, even more so than earlier Getter-1 models. It is capable of ultra high-speed flight in zigzaging, UFO-esque patterns, akin to Shin Getter.