Assassin neko's, though highly intelligent, still (almost) have a human body but with other different features. They don't have all that much strength, but they more than make up for it with incredible senses and dexterity.
+3 Dex
+1 Wis
-1 Str

The Neko has heightened senses in comparison to most humanoids because they need to sneak up on their pray. Therefore Assassin nekos have proficiency in Stealth.

Assassin nekos take half of all fall damage and can jump 10 ft from a standstill.

Nekos are experts at moving and hunting in the dark, and have Darkvision up to 60 feet.

You can read, speak, and write Common and another language of your choice.

When you attack a creature you have advantage against you gain +1d4 to hit and deal an extra d4 + dexterityMod of your damage type