Big heart: long-lasting performance, little drama queen: good at acting.
Both of these are Internet terms. Big heart refers to having a good psychological quality and delivering a decisive blow at the last moment. "Little drama queen" refers to someone who plays a lot, is very good at adding drama to himself, and likes to attract attention.
Internet language refers to a language generated from the Internet or used in network communication, including various combinations of Chinese and English letters, punctuation, symbols, pinyin, icons, and text.