Vulko "Big Green"

Sea Legs. Vulko has advantage on ability checks and saving throws to resist being knocked prone while on a ship.

Spellcasting. Vulko is a 4th-level spellcaster. His spellcasting ability is Intelligence (spell save DC 13, +5 to hit with spell attacks). Vulko has following wizard spells prepared:
Cantrips (at will): Friends, Mage Hand, Prestidigation, Ray of Frost 
1st level (4 slots): Disguise Self, Fog Cloud, Mage Armor, Witch Bolt                                                                                                                                 2nd level (3 slots): Gust of Wind, Melf's Acid Arrow, Misty Step

Quarterstaff. Melee Weapon Attack: +2 to hit, reach 5 ft., 1 target. Hit: 3 (1d6) bludgeoning damage.