Karna was known for which of his Trait the most?

Karna's most defining trait was his legendary generosity (dana veera). He earned the title 'daanveer Karna' for his unwavering willingness to give away anything to those who asked, including his divine armor and earrings (kavacha and kundala) to Indra, and even his life to Kunti. While he was also skilled in archery and warfare, generosity is what distinguished him most in the epic.