+1 Iljimae
Angry Mom (Ji Soo's character, fear for those around him)
Sassy Go Go (again Ji Soo's character)
Two Weeks (not fear for himself, but the ones around him and the ones hes trying to protect)
honestly, I think the majority of Ji Soo and Lee Joon Ki characters have a sense of vulnerability
D-Day
Good Doctor
Kill Me, Heal Me
Protect the Boss