Base planet: Earth
Function: Unknown
Alternate mode: 
Earth Style motor boat

Galaxy Force name:  Chromia クロミア

Character History: Thunderblast was one of the "monsters" captured and imprisoned by Crosswise.  Her previous form is unknown, but she's now loose on Earth and set to contribute in her own special way to the Transformers Cybertron saga... more to come as season second-half episodes begin to air...

Official character text from packaging... 

Thunderblast knows that the weakest part of any Autobot is his obnoxious sense of nobility. They're constantly rushing to the rescue, and every last one of them would sooner scrap a basket of Antilian bumble-puppies than blast a female as pretty as she is. She uses that fact to her full advantage; more than one Autobot has fallen first for her charms, and then to her plasma torpedoes. As an agent working on Earth for Starscream, she knows better than to trust any Decepticon, but she finds a kindred spirit in the con-man Sideways.

Cyber Key Code: dh62
Little does anyone know but Thunderblast is actually one of the released ancient Decepticon monsters that Starscream freed from the North Pole. When she was cruising the waterways in the ancient days of mankind she was mistaken for the Sirens of myth and legend. Luring sailors to their deaths on the rocks, the playful (yet evil) Thunderblast would sing out in the ancient Cybertronian tongue to tempt the human sailors. She’s rotten that way...

STRENGTH: 7
INTELLIGENCE: 6.5
SPEED: 9
ENDURANCE: 6
RANK: 5
COURAGE: 5
FIREBLAST: 6.5
SKILL: 6

Bibliography of significant appearances:
Episoce 26, her first appearance