Gigabyte

Gigabyte is a computer-robot type character. He was made by government scientists and brought under the sea for some reason that is classified (a cover-up story says he is to research aquatic life).

Gigabyte's real plan is to rule the ocean. As there aren't very many computer robots under the sea, he also plans to marry Karen. These plans frequently get him into competition with Plankton.

On the least of opportunities, he likes to take advantage of Plankton to humiliate him. He also takes advantage of times where Plankton and Karen argue. Karen like Plankton more for obvious reasons.

On the occasion Gigabyte runs into other robots/computers or other mechanical beings, he would try to flirt with them. He is said to have two personalities: one's a villain bent on world domination, and the other's a Casanova wannabe.

Relationships
He largely interacts with Plankton and Karen in episodes he appears in.

He rarely appears with other characters like SpongeBob, Patrick, Squidward, or Sandy. He would most likely appear with SpongeBob since he often gets involved with Plankton.

He may have some interactions with Mr. Krabs when he gets involved with Plankton's schemes. In some cases, he would team up with Planton and torment him. At other times, he'd join forces with Mr. Krabs to humiliate Plankton.

Despite their rivialry, Gigabyte and Plankton may team up on rare occasions. Mostly to rule the world, or to torment Mr. Krabs and/or SpongeBob.

Trivia

 * He looks somewhat similar to Karen 2.
 * Like Karen, he makes numerous faces on his screen.
 * The red light/button on his chest is said to do something when pushed. Nobody knows what.