You have Resistance to Psychic damage. Moreover, if you start your turn with the Charmed or Frightened condition, you can expend a Psionic Energy Die (no action required) and end every effect on yourself giving you those conditions.
Guarded Mind
Raw data
{
"name": "Guarded Mind",
"page": 99,
"level": 10,
"__prop": "subclassFeature",
"header": 2,
"source": "XPHB",
"entries": [
"You have {@variantrule Resistance|XPHB} to Psychic damage. Moreover, if you start your turn with the {@condition Charmed|XPHB} or {@condition Frightened|XPHB} condition, you can expend a Psionic Energy Die (no action required) and end every effect on yourself giving you those conditions."
],
"consumes": {
"name": "Psionic Energy Die"
},
"className": "Fighter",
"classSource": "XPHB",
"subclassSource": "XPHB",
"subclassShortName": "Psi Warrior"
}