Onathan

Onathan is an Aperture Science Personality Construct who was built to be an "Ego Core", meaning he is (at almost all times) overly narcissistic and full of himself, believing himself to be better than all other cores in the facility.

He was first introduced as part of the series The Underground but has gained more popularity recently after appearing as a recurring character on the series Meet The Cores.

In Marvel Storybook 2, Onathan gave a secret ring for Sonic but decided that he just wasn't good enough for him.

85 Reasons Why I'm Better Than You
When he first appears in Episode 1 of Meet the Cores, a slideshow is playing behind Onathan. This slideshow is called "385 Reasons why I'm better than you", and plays in the background.

List of Reasons

 * 1. I'm just better than you.
 * 2. My cervo-motor is bigger than yours.
 * 3. I was built to be perfect in every way (and you weren't).
 * 4. My intelligence chip is more intelligent (than yours).
 * 5. Onathan is a better name than your name.
 * 6. My job is far more important than yours.
 * 7. I own more trophies than you. (you don't own any) (probably).
 * 8. My optic is more HD than yours.

The camera cuts away to Rusty, and when it returns the slides are already quite far ahead.
 * 174. I can pronounce "Pneumonoultramicroscopicsiliconvolcaniconiosis" perfectly. (and you can't)
 * 175. I own a significantly higher amount of hats than you.

Meet The Cores 3
Ego realizes that his badge has gotten rustier, he buys a badge polisher but it takes too long, he turns on turbo mode, it goes too fast and then it explodes. back to Onathan as he gets coloured in red by the gel as his badge knocks off and falls down.

it cuts the Onathan at the bar, he asks for the strongest thing from Bar Atlas. he plugs it in, and he hallucinates, he hallucinates about his badge and how it tells him that he's the best core, but it shows that it is actually Chuck as he then tasers him, thus he falls into the cloning machine, and then 3 clones are first made. and then more are made as the video ends.

Trivia

 * An image is shown in episode 1 of Meet The Cores which depicts Onathan next to a trophy engraved with "BEST CORE 1992", which he presumably won.