Cap'n Seadog

Shapechanger. Cap'n Seadog can use its action to polymorph into a wolf-humanoid hybrid or into a wolf, or back into its true form, which is humanoid. Its statistics, other than its AC, are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.

Keen Hearing and Smell. Cap'n Seadog has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Flourish. Cap'n Seadog adds its Charisma modifier to the damage roll for its longsword attacks (included in the attack).

Sea Legs. Cap'n Seadog has advantage on ability checks and saving throws to resist being knocked prone.

Multiattack. Cap'n Seadog makes two attacks: two with its longsword (humanoid form), one longsword attack and one bolter attack (humanoid form), one with its bite and one with its claws (hybrid form), or two bite attacks (wolf form).

Bite (Wolf or Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) piercing damage. If the target is a humanoid, it must succeed on a DC 12 Constitution saving throw or be cursed with werewolf lycanthropy.

Claws. (Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 7 (2d4 + 2) slashing damage.

Repeating Light Bolter. (Human Only) Ranged Weapon Attack: +5 to hit, range 30/120 ft., one target. Hit: 6 (1d6 + 3) piercing damage.

Cursed +2 Longsword (Human or Hybrid only). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (1d8 + 7) slashing damage, or 12 (1d10 + 7) slashing damage if used with two hands.

Shape Up, Ye Dog (2/day). Whenever a friendly creature within 30 feet of the captain that can hear it misses with an attack, the captain can yell perilous threats to allow that creature to reroll the attack roll.