"A "shaved ice" version of Jack Frost created by the genius thaumoscientist Dr. Thrill after he moved to Japan. He absorbed Japanese pop culture and took a liking to hero groups and shaved ice. It is unknown whether he actually tastes like a Blue Hawaii."
—Soul Hackers 3DS Compendium
By accepting the request from Dr. Thrill at the Pet Shop asking for a Heqet, the Protagonist will receive B. Hawaii Frost.
In the sidequest needed to unlock the Frost Five, B. Hawaii Frost is the first to transform, and explains the circumstances of the battle. The protagonist communicates with him to direct the other Jack Frosts across the battlefield.