1.  sympathiser(n = noun.person) comforter, sympathizer - commiserates with someone who has had misfortune;
is a kind of communicator
has particulars: job's comforter
Derived form verb sympathise₂

2.  sympathiser(n = noun.person) sympathizer, well-wisher - someone who shares your feelings or opinions and hopes that you will be successful;
is a kind of admirer, booster, champion, friend, protagonist, supporter
has particulars: bleeding heart, fellow traveler, fellow traveller
Derived form verb sympathise₁