Bahamut

Bahamut, the Platinum Dragon is the deity of good-aligned dragons and metallic dragons. He is a sworn enemy of Tiamat, the Scaled Tyrant, who is the queen of the chromatic dragons.

Symbols
The common symbol of Bahamut is a shield with brilliant silver dragon head in profile. The worshipers often carve this symbol to protect themselves during their holy missions. Bahamut is accompanied by two colors — white and silver, which are also the usual clothing pallette of his followers.

Issylra
In Vasselheim, the district of Silver Talon's Reach is dedicated to the worship of the Platinum Dragon. The Platinum Sanctuary, the oldest known temple to Bahamut, resides within Silver Talon's Reach.

Tal'Dorei
One of the two largest cathedrals in Emon's Temple District is to the Platinum Dragon. A shrine to the Platinum Dragon is also one of the three largest in Westruun.

Wildemount
The Platinum Dragon is one of the deities that is approved for worship in the Dwendalian Empire. The temple of the Platinum Dragon in Zadash is called the Platinum House, and the central temple in Rexxentrum is called the Dragon Seat.

History
Bahamut was among the Prime Deities who fought against the Betrayer Gods. Following the Dawn War, in which Bahamut helped defend Vasselheim, the platinum dragon shed a tear for the sacrifices his devoted followers had made in the war. From that tear was born a crystal, the Star of Exaltation, which was preserved for millennia, until shortly after 510 PD, when the city came under a terrible siege. The crystal was used as a focus in a ritual to bring Bahamut's intervention to defend Vasselheim, and this expended the last of the crystal's power and destroyed it on the Material Plane.

Bahamut's devout paladin, Kima of Vord, received some of her fighting implements directly from an avatar of Bahamut.

Campaign One: Vox Machina
Bahamut sent Kima on a vision quest that set into motion the events at the beginning of the Critical Role stream: Kima had gone into the Underdark beneath Kraghammer to stop a great evil that was growing there. Allura asked Vox Machina to find Kima, help her, and return with her safely.

When the Chroma Conclave made its initial attack on major cities including Emon, Allura felt confident the chromatic dragons would not try to attack Vasselheim, not only because it is well-defended but because it is the center of Bahamut's influence, and Bahamut stood against such creatures. Indeed, the Conclave did not attempt it.

After Vox Machina defeated Vecna, they gathered in the Platinum Sanctuary and Keyleth gave an inspiring speech, after which light peeked through the clouds and they felt the presence of Bahamut and possibly Pelor and Sarenrae.

Known worshipers
Many who worship Bahamut recite the following as a morning ritual:

Vasselheim, Othanzia

 * Highbearer Vord, the leader of the Order of Bahamut.
 * Scalebearers Desona and Vorack were sent with Vorack from the Platinum Sanctuary in Vasselheim to escort the Horn of Orcus.
 * Scalebearer Yon, a disciple of Bahamut who greeted Vox Machina as they arrived in Vasselheim for the first time.
 * Platinum Knight Udire, the finest champion of the Platinum Sanctuary.
 * High Paladin Archibald at the "grand chantry" in Othanzia.

Other

 * Guardian Tofor Brotoras: Dragonborn paladin and a member of the Tal'Dorei Council.
 * Lady Kima of Vord: Halfling paladin, adventuring ally and later wife of Allura Vysoren, and adventuring ally of Vox Machina.
 * Herald of the House Kumas: Priest in Zadash's Platinum House.
 * Calianna Mordsson: Half-elf draconic sorcerer and survivor of a cult of Tiamat.

Trivia

 * The Platinum Dragon's holy day is Embertide, celebrated on the fifth of Duscar.
 * In Explorer's Guide to Wildemount, the high-level adventure The Krakenwhacker involves a ship of the same name with a magical figurehead of Bahamut.
 * Mollymauk, in public, pretended to be a worshiper of the Platinum Dragon to mask his following of the Moonweaver and avoid prosecution for worshiping an unapproved deity.