In Jain tradition, “Champa” (also written Campa or Champapuri) is not a person but an ancient city.

• It was the capital of Anga (near today’s Bhagalpur, Bihar).
• It is especially sacred because the 12th Tirthankar, Bhagwan Vasupujya, was born in Champapuri and, according to both Digambar and Shvetambar traditions, attained Kevaljnan and Moksha (liberation) there.
• Bhagwan Mahavira also spent time preaching in and around Champa during his vihars.

If you meant a person named “Champa,” there isn’t a well‑known central figure by that exact name in the main Jain scriptures; the word usually refers to this holy city.