Ayla

Multi-attack. Ayla makes 3 attacks: 2 with her bolts, and one with her blade. 

Fire Blade (4 per day). As a bonus action, Ayla can ignite her arm-blade with arcane fire, deal an additional 2d4 fire damage on a successful hit, or 1d4 on a failed hit. This effect lasts for 1 round before the flame runs out. 

Stunning Shots (2 per day). Ayla can use two of her bolts per day and create a small, stunning explosion. The target must make a DC15 CON save. On a failure, they are stunned for 1 round and take 2d4 thunder damage. On a success, they take 1d4 thunder damage and aren't stunned.

Arm blade. Melee Weapon Attack: +8 to hit, reach 5-30 ft., 1 target. Hit:  2d12+4 slashing damage. 

Bolts. RangedWeapon Attack: +7 to hit, range 10/75  ft., 2 target. Hit: 5d4+2  piercing damage.

Smoke Cloud. As a reaction to being hit, Ayla can release a putrid cloud of black smoke from her chassis. This smoke will hover thickly for 1 turn before beginning to disperse. It requires a DC10 Athletics check to get out of the smoke, or a DC17 Perception check to find Ayla in the smoke. 

Thunderbolt. When Ayla is reduced to 1 HP, she will release a massive bolt of electricity, killing her and trying to kill her opponent. On a DC22 Athletics or Acrobatics check, the target avoids the blast entirely. On a DC17 Ath/Acro check, the target takes half damage. Any lower, the target takes full damage: 4d20+8 lightning damage.