Charmed
A creature that is charmed is charmed by a single creature. A charmed creature is in control of their actions.
The charmed creature cannot attack or otherwise cause any harm knowingly to the creature that charmed them, unless compelled to by other magic.
The charmer has advantage on all checks to socially interact with the charmed creature.
Notes
A charmed creature might be in awe of their charmer or consider them very likeable, even if that would not normally make sense.
If a player character is charmed, the player should be in charge of how their character behaves. However, if the character is the subject of a charm effect like a vampire's Charm ability, the player character may have to follow certain rules or guidelines. In a few cases, a charm effect may allow the charmer total control of the charmed creature.