Horrifying Hero: Godzilla is over 200 feet tall, looks like a cross between an iguana and a Tyrannosaurus rex, and breathes a stream of atomic fire. The citizens of New York are quite justifiably terrified of him. Well, those reasons and the whole fact that his biological father kinda destroyed a good chunk of the infrastructure of New York during the movie...
It Can Think: He's been shown to be surprisingly clever at times, outwitting some monsters, responding appropriately to Nick's instructions and even recognizing when the situation calls for different tactics.
Lightning Bruiser: Is as fast and agile as Zilla but has the strength, durability and atomic breath of the Japanese Godzilla.
Love Hurts: In one episode, he fell in love with a mutant Komodo dragon, Komodithrax, and became her mate and surrogate father of her egg (she could reproduce asexually). When she and the egg were lost at the end of the episode, Zilla Jr. roared his grief and despair to the world.
Power Glows: His eyes and spines right before he uses his atomic heat ray.
Took a Level in Badass: (For the third time on this page alone) In addition to having whatgoodqualities Zilla possessed, he has the original Godzilla's tough hide, healing, strength, determination and, of course, his power breath. Plus he's pretty smart.
Vegetarian Carnivore: Inverted. He's a mutated marine iguana, which are herbivores, but his diet consists mainly of fish. He's also chased after giant mutant rats in one episode.
Amusingly, the team once tried to feed him seaweed substitute to prevent him overeating the local fish stocks, but he simply spat it back out once he tasted it.
Meaningful Name: Niko is a short form of Nikolaos, which is Greek for "victory of the people". Guess what his discoveries leads to in the film and throughout the series.
Nerves of Steel: A bit in the film. When Zilla shows up to check him out during the first fish bait trap, the big guy was inches from Nick. Nick also noticed some soldiers getting ready to fire at Zilla and signals them to hold their fire.
Majorly Awesome: To an extent. While he usually plays second fiddle to H.E.A.T. and Junior, Hicks does have his own moments of Awesome, is usually out on the field getting dirty, and does note that he sometimes have to follow orders despite the team's advice.
Reasonable Authority Figure: While he has voiced that he would prefer to nuke every mutation out there, he understands the necessity of keeping Junior around and has many times let HEAT do things their way to save the day.
Audrey Timmonds (Paget Brewster)
Going for the Big Scoop: This actually jeopardizes her relationship with Nick in one episode when Junior was going through his version of growing pains.
Nerves of Steel: While most other people are either ducking or scrambling for cover during the latest "Godzilla vs Monster of the Week" throw down, he still keeps on taping in the middle of the action and doesn't let go of his camera, come hell or high water.
The Bad Guy Wins: He got away with giving Humongous Mecha to three villains by claiming they stole the mecha from him and even convinced the government to buy mecha from him, which was his goal all the time.