Sympathy

Sympathy is a unique phenomenon linked to Sense Energy.

Description
Charlotte, as well as other scientists, describes Sense Energy as being released due to the strength of human thoughts and their desires causing it to become their energies source. As a result of this, during the clash between the energies between slayers, sometimes their feelings can also flow into either one or both involved letting them understand them and even at times letting them read one another's pasts.