Kanto
Bolt - Zapdos
Patronage: Mastery over electricity, shared with Raikou
Marcella - Moltres
Patronage: Mastery over fire
Bianca - Articuno
Patronage: Protecting mountaineers
Johto
Kazuo - Lugia
Patronage: The sea. Favored by sailors.
Team: Lapras, Ampharos, Dragonite, Dhelmise, Bronzong, Palossand
Kazuo is the current champion of the Phorus region. Laid back and friendly, he currently lives with Bolt the Zapdos.
Nijiko - Ho-oh
Patronage: Rebirth and recovery.
Setsuko sees Kazuo as naive. They are not on speaking terms anymore.
Tallulah - Suicune
Patronage: Safe waters
Raiju - Raikou
Patronage: Mastery over electricity, shared with Zapdos. More common in Johto.
Daichi - Entei
Patronage: Volcano and wildfire safety
Hoenn
Roland - Groudon
Kylie - Kyogre
Sinnoh
Diana - Dialga
Pearl - Palkia
Aldric - Arceus
Patronage: Pretty much whatever isn't covered. Arceus is considered a catchall.
He rules over all other legendaries but is a fairly hands off ruler. He only makes official appearances when the situation is dire. Aldric takes the form of a young concert pianist who tours various regions ostensibly under the guise of performing but uses the visits to check in with the other gods.
Kalos
Sybilla - Xerneas
Patronage: Life and vitality. Favored by naturalists and healers.
Sybilla is one of the four tasked with rebuilding the world after the events of the Lost Century, healing the land. She has the power to grant shifter/human couples children, though her ability has severely diminished after losing her followers. Currently married to Adonis with an Eevee son.
Galar
Dr. Ashe Irons - Zacian
Dr. Ashe Irons is the head curator of the Royal Galar Museum and the foremost expert in medieval Galarian history. She is exceptionally intelligent and can come across as haughty or arrogant. She never got involved in the Lost Centuries of Phorus and only found out about the conflict after the fact. She finds the entire ordeal messy and foolish.
Patronage: Warriors and strength. In Galar it's a little ambiguous so Zacian has a wide appeal, particularly with trainers who carry sword iconography for strength in battle.
Doyle Irons - Zamazenta
Doyle is a professional blacksmith doing demonstrations of classic smithing techniques at a living medieval village attraction. He may look like a large intimidating man but he's quite easy going and jovial. He has a natural magnetism and makes friends with ease, frequently telling his much stiffer elder sister, Ashe, to lighten up. He had nothing to do with the Lost Centuries and figures it's easier to avoid the whole mess.
Patronage: Defenders of the weak. Like Zacian, Zamazenta is a little vague but generally finds reverence among law enforcement.