Valor

Valor is the general upvote system used for charms.

General
Valor is used as the major method of upvoting and upgrading a profile charm. Valor is increased when a user waves at your charm, which will increase it's valor. Being gifted or using an item can also increase the amount of valor given to you. A higher level of Valor increases the EXP of your charm, which can assist in leveling the charm up.

Waving can be done once a day.

History
Valor was introduced with the Charm Update in 2017 and has been used ever since. It is the major way to interact with a user's profile after they have been liked and friended. It has not changed since.