enthousiaste

noun
  1. A person who is very passionate or excited about a particular activity, subject, or cause. noun
    She is an enthousiaste when it comes to environmental conservation.
    As an art enthousiaste, he visits galleries every weekend.
  2. Showing intense and eager enjoyment, interest, or approval. adjective
    His enthousiaste response to the proposal was encouraging.
    The audience gave an enthousiaste applause after the performance.