Character Idea

I've been considering two ideas still not sure which one i should do;

1. The mutated/evolved sea creature that has a moral dilemma that is against attacking the humans in Sydney harbor, however it understands why his race is attacking/eating the humans, as his home was destroyed by the oil spill, losing his family/friends that didn't survive the mutation or toxicity of the oil.

Description:
-not like the other sea creatures, not very fearsome looking, quite docile looking too cute to be fearsome.
- feels like an out cast for overcoming the hunger/madness, feels/looks different
-has a memory of a human showing compassion towards the character (fisherman putting him back in the sea)
-believes what his race is doing is wrong yet understands their anger/madness
-small build not strong like, yet has an iron will and feel compelled to help the humans to survive/escape that are trapped in Sydney harbor

2. Human victim that has been infected. Who is trapped in ground zero. Refuses to leave his/her home or let sea creatures take over. But is on the verge of being turned in to a sea/land creature becoming apart of their hive mind and can understand their feelings. The character is torn between trying to keep his/her sanity or be apart of a race that seems to be of one mind that is overwhelming the character