Squidward Tentacles

"Too bad SpongeBob's not here to enjoy SpongeBob not being here!"

- Squidward in The SpongeBob SquarePants Movie

Squidward Tentacles is the tritagonist of the SpongeBob SquarePants animated series. He is a clumsy neighbor of SpongeBob SquarePants (the other ones being Patrick Star), as well as the rude, disloyal and lazy cashier of the Krusty Krab restaurant. Despite this he is also quite sympathetic, of course as his life is little more than a dismal faliure, and he is constantly pushed to the brink of insanity by his annoying neighbors. SpongeBob and Patrick consider Squidward to be their friend, but this feeling is not mutual. Squidward also has a passion and interest in reading, arts and music, and is very fond of playing the clarinet, though no one considers him to be very good at it, the same for his art work. Although he hates him with a passion, Squidward usually does show a side of kindness and compassion for SpongeBob at times and even respects him. He is rivals with another squid named Squilliam Fancyson.

Personality
Squidward is best described as as ill-tempered, pretentious, and cynical who strongly despises his neighbors for their constant boisterous, noisy behavior. However, the pair are unaware of Squidward's antipathy towards them and see him as a friend. Squidward works as a cashier at the Krusty Krab restaurant, a job that he is apathetic towards.

Squidward also has a passion and interest in reading, arts and music, and is very fond of playing the clarinet, though no one considers him to be very good at it, the same for his art work due to his bad taste. This however, not always the case as in some occasions, his artistic talents somewhat more improved than it used to be.

The post-movie seasons (Season 4 and so on which actually set between events from both the first 3 seasons and The SpongeBob Squarepants Movie) revealed that his misery, and inability to see the positive side of his neighbor's antics has developed a darker side of his personality where he sometimes became the wrathful, indifferent, and sadistic. The revelation of these negative traits were previously foreshadowed by him nearly killed SpongeBob with his brutal booby trap joke in the retaliation of the latter's annoying but harmless jokes in Fools in April episode. Not only that, in various cases of his antagonistic acts that he performed, he sometimes done so in more malicious manner where he unknowingly became slavedriver for SpongeBob as seen in Can You Spare A Dime?, and  Squidward, the Unfriendly Ghost, fooling anyone to gained advantage for improving his life in spite of small percentage of success, or the worst, illegal acts includes verbal and physical abuse that threatened him to sent to jail. The worst instances of his antagonism are when expresses his lack of remorse and genuine malice was when reading SpongeBob's diary aloud, disagree with his friends' idea to brought SpongeBob back hom after remorseful with their abuse on him in retaliate of misfortunes that he unintentionally caused, and lend his landmower to both SpongeBob and Patrick hoping that they harmed themselves by accident where in these case, he potentially crosses MEH. These negative traits were reasons why some Bikini Bottomites antagonize him out of sheer hatred.

Relatives
Family: Relatives:
 * Mr. Tentacles (father)
 * Mrs. Tentacles (mother)
 * Grandma Tentacles (grandmother)
 * Unnamed cousin

Powers and Abilities

 * Strength: On multiple occasions, Squidward has been shown to be able break through walls with ease. He even lifted his own house in one episode.
 * Durability: Like SpongeBob, Squidward has been shown to be nearly indestructible. In one episode, he survived a nuclear explosion.
 * Artistic Skills: Squidward proved himself as the artist with promising talent in singing, painting, sculpture, playing his trademark clarinet, etc. Unfortunately, he's not always appreciated on his works due to his sonewhat bad taste.
 * Magma Manipulation: As Captain Magma, he can control and fires magma blasts from the volcanic cone on his mask. Unfortunately, due to lack of proper mastery over  this powers, it resulting him accidently toasted SpongeBob (where ironically, he didn't intended to harm him as his actual target was Man-Ray, Dirty Bubble, and evil Barnacle Boy).
 * Sonic Wave Emission: As Sour Note, he can fire sonic waves (which often depicted as blast of bubbles) from his signature clarinet, either in form of sonic waves that paralyzes everyone whom hearing it and in form of concussive beam.
 * Giant Size: As Sour Note, he was noticeably larger than in his natural form.

Trivia

 * Squidward's negative actions proved that he can also proved antagonistic, even nefarious enough to crosses MEH.