Some more brain storming ideas (think i'v settled on a character idea):
The Lore - ιππότης ελιάς (Olive Knight)
He no longer has a functional heart, something happened to him and his heart is now fused/dependant/transformed into an Olive tree.
Does eating the olives slow the growth of the tree in his heart? Perhaps it speeds it up? All we know is that tree is slowly killing him. What price must he pay for that power ... how did he end up with an olive tree growing out of his heart?
Maybe needs to continuously consume olives or perhaps pour olive oil into his heart?
Wandering Knight type of theme? maybe the people he helps pay him in olive oil...
Potential Fighting Characteristics
He powers up from eating olives then and goes berserk, he stops using his shield and duel weids two Xiphos (Xiphos are ancient Hellenic weapons that resemble short swords) (puts shield on back).
Aesthetics
Big upper body small legs?
The olive tree growing out his heart will have swirling branches (can really play around here to get some nice shapes) ~ these branches grow when he powers up.
Golden Armour
White cloth & Cape Maybe ?
Now to try get some of these ideas drawn!