The Blind (陰る, Kageru) is a type of problematic debuff most notably to cause the character to go blind.
The effect may be inflicted to any party.
Blind would makes the in-game-interface to be completely pitch-black, which promotes difficulty for the player to control or even attack the correct target. During Blind, there are no allies or foes to be classified, which means any actions would affect both of them regardless of sides.
A party member which is inflicted with Blind cannot be switched with.
Sensically, a unit that have no eyes or does not rely on vision are basically immuned to Blind.
A Ranged enemy unit inflicted with Blind would not attack at all.