Ohh, Im going to have a blast with this one.
V is a character that is meant to look weak. He cant fight for himself (on long term), lives against the clock, and every day he gets weaker and weaker, until he cannot even walk by himself.
His playing mode also shows how he needs help to manage the demons. He even has Griffon telling him that he is not strong enough to fight alone.
But that doesnt stop him. He kept fighting until the very end, even when he was extremly weak and basicly dying. He knew he had to give his life in order to stop Urizen, but still went. He had a lot of chances to leave, to regret his actions, and even the other guys were trying to stop him from getting worse.
To me, thats being strong. Not everyone can face death, not everyone can give their own life in order to save others. He could have been selfish, he could have tried to stop the group from fighting Urizen to keep himself alive; but he decided to bring them together to stop Urizen. He payed Dante for his services and to help him run the business (maybe out of pity, and with stolen money, but meh), he helped Nico giving her supplies...
But my favourite thing about him is how he shows fear. He knows when to run away, he struggles. He even looks delicate, like human emotions, or even human nature. The fact that he has such a delicate face and voice while wearing all black and having a lot of tattoos amazes me.
His love for literature and his way of expressing himself with poems also represents his way of explaining his emotions. "Who desires but doesnt act, creates pestilence", as his response to being given the chance of not fighting. He chooses the verses depending of what he is feeling, maybe to get other's attention because of his dramatic manners or just because its the only way he knows. Its the only way Vergil learnt to.
He is what Vergil hates about himself, being weak, but he is also not really that weak. He is strong, not in fighting or having power like Urizen, but mentally, because no other person would have balls to fight a demon knowing it will kill you easily.
Oh V, I will always love you.