Gren Sacher (グレン・ザッハー Guren Sahhā) is a member of Kurvaz's Special Operations Unit and Opéra Kranz's faithful subordinate. He has pledged his allegiance to Opéra and is very straight-laced and incredibly serious. He pilots the Méphisto TA.
Gren is quiet and calculating, not doing anything before thinking it through. He has an oriental sense of honor, which is especially true when around Opéra, who he has romantic feelings for as hinted in several illustrations and further confirmed in the Little Tail Bronx Archives.
He is often partnered up with Calua Napage who is basically his brother-in-arms. He is always having to struggle with Calua's impulsive nature and seems to get the bad end of the deal. Despite Calua's personality is almost the exact opposite of Gren's, they maintain a brotherly relationship.
Gren is a light blue colored Kishu Inu. He has long blue hair tied into a ponytail, which along with his blue armor and Asian styled clothes gives him an appearance reminiscent of a samurai. His eyes are collared reddish-purple.
- Gren's voice actor was known for his role as Saizou/Ninja Blue from Ninja Sentai Kakuranger. Coincidentally, his character theme color is also blue in Japanese Warrior clothing.
|Locations:||Airedale, Spinon, Davren Islands, Vizsla, Shetland, Basset, Samoyede, Golden Roar, Pharaoh, Mau, Sealyham, Duel Ship, Lares, Tartaros, Ragdoll|
|Main Characters:||Red Savarin, Chocolat Gelato, Elh Melizée|
|Supporting:||Béluga Damiens, Québec, Flo, Fraisier|
|Kurvaz:||Bruno Dondurma, Opéra Kranz, Gren Sacher, Calua Napage, Merveille Million|
|Red Data Children:||Nero, Blanck, Carmine, Rose, Rouge, Vermillion|
|Mechas:||Dahak-AZI03, Dahak MK2, Tiamat-FL, Mephisto TA, Ultra Méphisto, Cassandra Cross, Zairita-AZI02, Salamander//009, Septentrion, Srvara-AZI01|