History Characters / OmoriMainGroup

* AnnoyingYoungerSibling: Downplayed. Kel is annoying, but Hero gets along with him well. The person who gets annoyed the most by him is Aubrey, whom he gets into many petty arguments with.

** More severely, Basil's guilt over [[MakeItLookLikeAnAccident covering up Mari's death as a suicide]] has eaten away at him for ''years'', with no apparent attempt on his part to repress it like Sunny did. By the time the game starts, [[SanitySlippage he's barely keeping it together]], and a combination of Sunny moving away and the implied death of his grandmother finally causes him to snap.

* NeverSuicide: After Sunny accidentally killed Mari, it's Basil who comes up with the plan to frame it as a suicide.

* ThousandYardStare: Contrasting his friends, Basil's eyes look a bit off, with noticable eye bags and a constant look of sadness in almost all of his sprites.

* UnwittingInstigatorOfDoom: His attitude and actions cause a huge amount of friction among the group, and he's as much responsible for Something as Sunny was by helping disguise Mari's death as a suicide, as it only stops existing once they both finally overcome it in their shared guilt.

* MoodSwinger: Basil can go from somber and withdrawn, to frantically yelling his lungs out, to crying his eyes out, to calmly rationalizing how Sunny would never leave him at the drop of a hat. This is part of the SanitySlippage eh goes through.

* BrokenPedestal: Played with. Sunny was on such a high perch for Basil that Basil could not process the idea that Sunny would hurt someone, let alone kill Mari (even if that was a complete accident). As a result, Basil began to undergo SanitySlippage as he deperately tries not to confront the idea that Sunny is a killer, while also trying to block out his own role in covering up Mari's death as a suicide. The GoldenEnding finally has Basil admit the truth and take Sunny off of this perch, and this is treated as a good thing by the narrative, because Basil can finally see Sunny for who he is and what he's done rather than twist himself in knots trying to not believe the evidence of his own eyes.

* ParentalAbandonment: Basil's parents left Basil to be brought up by his aging grandmother since toddlerhood.

* BrokenPedestal: Played with. Sunny was on such a high perch for Basil that Basil could not process the idea that Sunny would hurt someone, let alone kill Mari (even if that was a complete accident). As a result, Basil began to undergo SanitySlippage as he deperately tries not to confront the idea that Sunny is a killer, while also trying to block out his own role in covering up Mari's death as a suicide. The GoldenEnding finally has Basil admit the truth and take SUnny off of this perch, and this is treated as a good thing by the narrative, because Basil can finally see Sunny for who he is and what he's done rather than twist himself in knots trying to not believe the evidence of his own eyes.

* DeathByIrony: Helped cover up a manslaughter as suicide. Potentially kills himself over it.

* HisOwnWorstEnemy: Has as much self-loathing as Sunny.

* KilledOffscreen: The "best" outcome of the Hikikomori route -- where he and the rest of Faraway Town are nonentities -- heavily implies that he still kills himself without the intervention of Sunny.

* LockedOutOfTheLoop: He's the only one of Sunny's friends who didn't know about his moving away until Kel dropped the bomb to him on the evening of Three Days Left. It shows just how wide the distance between him and Sunny, his best friend, has grown over the past four years; he can't even bear to take a look at Sunny's house and discover the "on sale" sign.

* MoodSwinger: Basil can go from somber and withdrawn, to frantically yelling his lungs out, to crying his eyes out, to calmly rationalizing how Sunny would never leave him at the drop of a hat.

* NervousWreck: He spent the last four years in nigh-constant anxiety over the secret he and Sunny hid.

* DeadAllAlong: She's been dead for four years in the real world, in contrast to Headspace, where she's still around with Omori and friends.

* FatalFlaw: Her [[ThePerfectionist perfectionism]] is basically what caused her death -- she and Sunny were practicing for a recital, but her insistence on a perfect performance led Sunny to become so frustrated with his inability to live up to her standards that it caused the argument that ended with Sunny accidentally pushing her down the stairs and killing her.

* AntiVillain: There's nothing inherently villainous about Basil, even if he's an antagonist on some routes. Basil tabs Sunny in the eye during the boss fight against him, and is DrivenToSuicide in a few more. This is because Basil's own Something, and his guilt over covering up the AccidentalMurder of Mari, have made him an opposing force to Sunny's recovery while still ultimately keeping Basil somewhat sympathetic when it's shown that his reason for covering up the murder was to help Sunny.
* BreakTheCutie: His part in Mari's supposed suicide has left him downright ''shattered'', even worse than Hero and Sunny. And if Sunny doesn't visit to show he still cares, Basil will [[DrivenToSuicide kill himself]] out of sheer despair. However, the fact that Sunny is moving away and the death of Basil's grandmother have really done his mental state no favors. Even in the GoldenEnding of the game, Basil still becomes so overwhelmed with guilt that he stabs Sunny in the eye during a boss fight with him.

* FatalFlaw: Basil's belief that Sunny would never even accidentally cause another person's death, let alone that of his beloved sister, is what causes him to stage Mari's death as a suicide, which is where all the big problems begin.

* AlwaysSaveTheGirl: Or boy in his case with Sunny, and one that is brutally [[DeconstructedTrope deconstructed]] and PlayedForDrama. One of Basil's photos of Sunny's birthday reveals that he views Sunny as TheBabyOfTheBunch and feels the need to "take care of him". However, Sunny is only the youngest member of the friend group by a few months; the reality is that ''Basil'' is overwhelmingly codependent on ''him'' as a [[TheConfidant confidant]] after years of struggling with ParentalAbandonment and (implicitly) a friendless background. As a result of this, Basil actually looks ''up'' to Sunny with a degree of reverence, to the point that he's [[GoodCannotComprehendEvil practically unable to accept that Sunny could ever do anything wrong]]. He's willing to do anything to avoid losing Sunny's friendship... and ultimately he does, [[MakeItLookLikeAnAccident covering up the]] AccidentalMurder of Sunny's own sister (and one of ''his'' own friends) at the cost of his friend group and [[SanitySlippage mental wellbeing]] completely falling apart.
* BreakTheCutie: His part in Mari's supposed suicide has left him downright ''shattered'', even worse than Hero and Sunny. And if Sunny doesn't visit to show he still cares, Basil will [[DrivenToSuicide kill himself]] out of sheer despair.

* NonActionGuy: Even while travelling with the party, he isn't able to fight alongside them, which they take note of. [[spoiler:{{Averted|Trope}} should he tag along as Omori's only partner in the Hikikomori-route-exclusive BossRush... and make up for the absence of Aubrey, Kel, ''and'' Hero.]]
* PurposelyOverpowered: [[spoiler:There is a Hikikomori Route exclusive boss rush where he has full combat capability but is your only party member accompanying Omori. To compensate for being understaffed, Basil has access to tier three Emotions and incredible skills, with a unique Release Energy attack that fully restores your Heart and Juice.]]

The game's [[CharacterTitle titular]] [[{{Deuteragonist}} deuteragonist]] and a major antagonist. He is a quiet {{Hikikomori}} who lives in White Space, with only his cat Mewo to keep him company. His neighbors -- Aubrey, Hero, and Kel -- eventually convince him to join in their adventures. While he does not enjoy it at first, he grows to enjoy the adventures he has.

* TheAntagonist: After reaching Black Space, his true nature as Sunny's central foe starts to creep in as the part of Sunny's mind that believes that he should kill himself for accidentally killing his sister.

* BigBadEnsemble: While he was created to keep [[EldritchAbomination Something]] in check, he's the one responsible for Headspace existing, the one responsible for Basil going missing, is the representation of Sunny's suicidal depression and denialism, and is the FinalBoss. Accepting both Omori and Something is key to Sunny healing from his trauma.

* WalkingSpoiler: It's difficult to discuss Omori without spoiling that he's one of the main antagonists of the game and more than just Sunny's Headspace avatar.

The game's [[CharacterTitle titular character]] and main antagonist. He is a quiet {{Hikikomori}} who lives in White Space, with only his cat Mewo to keep him company. His neighbors -- Aubrey, Hero, and Kel -- eventually convince him to join in their adventures. While he does not enjoy it at first, he grows to enjoy the adventures he has.

While seemingly just Sunny's Headspace avatar, towards the end it is revealed that he is a separate entity from Sunny, one who represents Sunny's depression and denialism of his trauma. He serves as the FinalBoss of the game when Sunny finally uncovers his memory of him accidentally killing his sister and tries to get Sunny to commit suicide when he can no longer run away from his past.

* BigBad: While he was created to keep [[EldritchAbomination Something]] in check, he's the one responsible for Headspace existing, the one responsible for Basil going missing, is the representation of Sunny's suicidal depression and denialism, and is the FinalBoss. Accepting both Omori and Something is key to Sunny healing from his trauma.

* WalkingSpoiler: It's difficult to discuss Omori without spoiling that he's the main antagonist of the game and more than just Sunny's Headspace avatar.

* GameBreakingInjury: Mari used to be a softball player, but she had to abandon the sport thanks to a knee injury that never fully recovered. It was thanks to her bad knee that, once Sunny pushed her right at the beginning of the stairs, she couldn't support herself and fell to her death.