Alpine is a knight of the Blue Sky in the Rave Master franchise.
In his former life as a knight of the Blue Sky, he and the knights protect Resha during the Holy Bring Ritual. He is one who hands the Rave to Shiba after Resha has passed away. He and the other knights died in the war against Rare Kingdom and Dark Bring.
Alpine, who is created by Hiro Mashima, has some information for his creation. In Gearhound's notes, he and his comrades are named after dog breeds. He first appears in Rave Master episode 39, yet he has earlier cameos due to the Shuda arc. His Japanese voice actor is Hiroshi Yanaka, and his English actor is unknown.
He appears in Shiba's flashback when Shiba explains to Cattleya about Resha and him.