Animated armor is, you guessed it, armour that moves. your lost soul hides in this armor that strengthen you. your confusing body gives your charisma.

+2 strength, +1 charisma,  You cannot take off your armor, if the helmet falls off the body you are still alive, you may turn into a pile of armor and back at will, if you do not move then you appear to be inanimated armor, count as a construct, you can understand languages but can not speak them, you may cast spells but with -2 damage, to hit and to hit with the spells you have disadvantage.