Akku (fey aspect)

Magic Resistance. The fey dragon has advantage on saving throws against spells and other magical effects.

Limited Telepathy. Using telepathy, Akku can magically communicate with any other creature within 60 feet of it. 

Invisibility. As a bonus action Akku magically turns invisible for 1d4 hours, until it attacks or until its concentration ends (as if concentrating on a spell). Any equipment Akku wears or carries is invisible with it. 

Companion. Akku can take any action that it is capable of other than the Attack action. This includes the Cast A Spell, Dash, Disengage, Dodge, Help, Hide, Ready, Search, and Use an Object.

Bite. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 1 piercing damage.

 Venom Dart. Ranged Weapon Attack: +6 to hit, range 40/160 ft., one target. Hit: 1 piercing damage, and the target must succeed on a DC 10 Constitution saving throw or become poisoned for 1 minute. If its saving throw result is 5 or lower, the poisoned target falls unconscious for the same duration, or until it takes damage or another creature takes an action to shake it awake.

Heart Sight. Akku touches a creature and magically knows the creature's current emotional state. If the target fails a DC 10 Charisma saving throw, the drake also knows the creature's alignment. Celestials, fiends, and undead automatically fail the saving throw.

Invisibility. As a bonus action Akku magically turns invisible until it attacks, or until its concentration ends (as if concentrating on a spell). Any equipment Akku wears or carries is invisible with it.

Pact of the Chain. When Feity takes the Attack action, he can forgo one of his own attacks to allow Akku to make one attack with its reaction.

Can Touch This? When Feity casts a spell with a range of touch, Akku can deliver the spell as if it had cast the spell. Akku must be within 100 feet of Feity, and it must use its reaction to deliver the spell when Feity is casting it. If the spell requires an attack roll, Feity's attack modifier for the roll is being used.