Unlike other seers who wouldn't be able to lock onto a deceiver, his Life Ability is very powerful and was made to find things, so he can always find someone he has met before.
However, the rank 5 deceiver still has a mist of darkness obscuring their features and masking their voice. So he can't tell what the rank 5 deceiver truly looks like.
He also can't tell what the rank 5 deceiver has been doing at all because of that dark mist obscuring his vision. This makes him suspect that the armored warrior is a powerful deceiver.
He has also seen the armor of the armored warrior change in shape, color, and size, which reminds him of how the Mimic Life Ability of deceivers works. So he has become more and more inclined to believe that the armored warrior is a deceiver.
