a tiny paper gallant knight charm, I have 8 of these but can't figure out how it's used. Bard song actually reveals nothing but:

You focus on the a single rune inked on the surface of the gallant knight charm.
You note the composition of the rune, identifying it to be zihee'ka.
You manage to decipher the following runes:

(211) Bravery

Anyone have any idea on how it's used and also if it has any value? Amount of charges?