Godzilla, Optimus Prime, Iron Man and Neptune Tribute (Skillet - Legendary)

Four awesome characters, I can't express how much I love em.
King of the Monsters - who doesn't love a giant radioactive reptile battling other Kaiju (giant monsters) for either protecting humanity or himself. The Monsterverse incarnation is in the middle, he restores balance to nature but he doesn't fully protect humans.
Leader of the Autobots - also the Last of the Primes, this transforming robot is a noble leader and is willing to sacrifice himself to protect and give freedom to all sentient beings.
Genius Billionaire Playboy Philanthropist - name Tony Stark, he has a large ego and a large wallet. But under all that he is extremely protective over the ones he loves and will use his awesome armor for battling against gods and aliens.
Goddess of Planeptune - also going by the name of Purple Heart when she transforms, she loves to break the fourth wall and be lazy all day. Never really taken care in the world but when it comes to battling monsters or protecting her friends, she'll transform into the goddess that she is.
Song: Legendary by Skillet
I own none of these characters.