Gerd Frentzen began the series as the undefeated racing champion. However, as a result of an attack by an Amalgram, Gerd is paralysed and confined to a wheelchair. After being given drugs by a mysterious doctor, Gerd regains the ability to walk. He also gains the ability to transform into a Amalgram himself.
He is viewed as a hero, after helping XAT in a fight against an Amalgram. However, this all changes when he attacks his ex-girlfriend, Jill Hoffman. Jill claims that Gerd had no reason to attack her, and that he had merely lost control of himself. In truth, she had been having an affair with his boss, and was using Gerd.
Only two people did not believe Jill's claims, and continued to support Gerd after this event - Hermann and Malek. Unfortunately, continually being pursued by XAT caused Gerd to lose his sanity. He is killed by Joseph, in front of Hermann and Malek.
Gerd was the first major character to be introduced in BLASSREITER. Whilst he does die eventually, he was the primary character for the first part of the series. It should also be noted that Gerd's story has not yet been resolved (his innocence has not been proved, with the public still believing that all Amalgram are evil).
Something else to note is that a newly introduced character bears a strong resemblance to Gerd.