Embodied by these tropes, mainly:
Knight Templar Big Brother, Jerk With A Heart Of Gold, Comedic Sociopathy, Medical Horror, The Intentional Heartbreaker, Eyepatch Of Power, After-Action Healing Drama, Cosmic Plaything, Cloudcuckoolander, Resurrective Immortality, It Sucks To Be The Chosen One, Patient Zero, (Childhood) Brain Damage, The Gadfly
There's more, but, these are the primary ones that I find myself in the most. ↻