Cait Sidhe (5e Creature)
From D&D Wiki
Small fey (sidhe), any chaotic alignment
False Appearance. While the sidhe remains on all four, it is indistinguishable from a slightly large cat.
Little Bit Beastly. The sidhe is considered both a beast and a fey for any effect relating to its type.
Claw. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) slashing damage.
Defensive Jump. When the sidhe is subjected to a melee attack from a creature it can see, it can gain a +2 bonus to its AC for that attack. When the sidhe uses this feature, immediately after the attack, the sidhe can jump up to 10 feet away from the creature that attacked it as a part of the same reaction, regardless of whether the attack hit it.
Cait sidhes are a branch of fey that adapted to the Material Planes better than their relatives. Their inherent appearance, which resembles a slightly large cat, helped them blend into the humanoid society, especially human society. Many cait sidhes benefit from their "owners", who pet them without even realizing that their "pet" is actually much, much older than themselves.
Some cait sidhes become a bit too attached to the caring hands of humanoid creatures, to the point that they sometimes forget that they are not an ordinary cat. In the darkest corners of the alleys, cait sidhes make a shady trade among themselves for the finest catnip and state-of-the-art scratching pads.