Shadows:
Heart: I mean there's a lot, really, but the two biggest ones that come to mind are his longstanding guilt complex about... everything, and his tendency to repress his anger and frustration until it pops.
Head: Yes As Will Be Immediately Obvious Because His Biggest Issue Is Literally Triggered By Sentient Black Blobs [/Kanaya voice] but you know his deal already, he's traumatized backwards and forwards six ways to sunday
Other: Chronic Fatigue Grandpa is here to exist at you.
Light: his soul is made of light energy specifically designed to purify shadows MAYBE STAND BACK, KID