Bilgerat Swashbuckler

Ratfolk:

Nimbleness. The ratfolk can move through the space of any creature size medium or larger. 

Pack tactics: The ratfolk has advantage on its attack roll against a creature if at least one of the rat folk’s allies is within  5 feet of the creature and the ally is capable of attacking. 

Prehensile Tail. The ratfolk can manipulate their tail and use it as a third arm. 

Swashbuckler:
Lightfooted. The swashbuckler can take the Dash or Disengage action as a bonus action on each of its turns.

Suave Defense. While the swashbuckler is wearing light or no armor and wielding no shield, its AC includes its Charisma modifier.

Multiattack. The swashbuckler makes two attacks: one with a dagger and one with its rapier.

Dagger. Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 6 (1d4 + 4) piercing damage.

Cutlass. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.

Light crossbow. Ranged weapon attack: +5 to hit, range 80/320 ft, one target. Hit: 7(1d8+3) piercing damage. 

Variant attack:

Diseased bite. The ratfolk bites an opponent. This attack does 1d8 necrotic damage and has a chance of inflicting a random tropical disease. 

Hook. The ratfolk makes an attack with a hook-hand. This attack does 1d6 piercing damage.

Poisoned Tail. The ratfolk ties an iron spike to their tail, dipped in poison. This attack does 1d4 piercing and 1d8 poison damage.