Taja the Barbarian |
As Nefreet stated, Mesmerists are normally Pyschic casters:
Source
Mesmerist wrote:
Occult Adventures pg. 38
Spells: A mesmerist casts psychic spells drawn from the mesmerist spell list. He can cast any spell he knows without preparing it ahead of time. To learn or cast a spell, a mesmerist must have a Charisma score equal to at least 10 + the spell’s level. The saving throw DC against a mesmerist’s spell is 10 + the spell’s level + the mesmerist’s Charisma modifier.
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There are a couple of archetypes that change this to Divine spells, but I don't see any offhand that would make them cast Arcane spells...