Within the DC Universe, Nightwing is openly recognized as the beating heart of the superhero community. Events like Dark Crisis leaned into this concept, highlighting Nightwing's heroism as a beacon for his allies to rally behind. However, even DC's optimistic hero has a dark side he works to hide. Yet, Nightwing can't fully erase it.
Source：https://www.cbr.com/nightwing-dark-side-last-laugh-knight-terrors-dc-comics/
