Was thinking about the things Chara and Killer could’ve done in the pursuit of the vague concept of “something new,”and started thinkin’ about Chara's exploration of various routes in the Underground, particularly during Genocide route.
How they could involve a wide array of horrific and manipulative experiments and scenarios designed to push the limits of what is possible within the game world and to indulge their curiosity, control, and sadistic tendencies.
Psychological Experiments would probably be a big one, after sucess they achieved in creating the obedient weapon in Killer. Things like;
Mind games. Chara could orchestrating scenarios designed to break the spirits of the residents of the Underground, such as pitting friends against each other, spreading false information, or creating elaborate betrayals.
Gaslighting: Chara and Killer could manipulate the environment and events to make specific characters question their sanity, creating an atmosphere of paranoia and distrust.
Memory Manipulation: Using their control over the timeline, Chara could repeatedly reset to subtly alter events, creating different memories and reactions from the residents, testing the limits of their psychological resilience.
And of course, the use of torture and control, using various methods such as;
Physical Torture. Implementing various forms of physical torture on characters, either to extract information, for punishment, or simply for sadistic pleasure.
Emotional Manipulation. Forcing characters into emotionally devastating situations, such as making them witness the death of loved ones repeatedly.
Forced Choices. Presenting characters with impossible moral choices, forcing them to choose between equally horrific outcomes to test their values and break their will.
Such as isolating someone for awhile, depriving them of food and water, then making them chose between killing a loved one for food and water (something likely also done to Killer, helped create an animal in the form of ST3), or keep starving until they dust.
They’d definitely use social manipulation to their advantage, and manipulate the use of social hierarchies. Establishing a brutal social hierarchy where characters must fight for resources, safety, or status, creating an environment of constant conflict and fear.
Orchestrating alliances between characters only to force betrayals later, shattering trust and creating an atmosphere of perpetual uncertainty.
Carrying out punishments publicly to instill fear and obedience, making examples out of dissenters to maintain control. Using Killer as the tool to do it, as a testament of what both of them are capable of.
Biological and Magical Experiments could be an interesting one, possibly even used to further discourage Killer from engaging in anything that’s too “Sans-like” for him to feel stable and safe in—no science for you little dude. Blackmailing or intimidating Alyphs into helping.
Considering what happened with Killer and Chara’s souls, monster fusion was possibly one of the first things they tried. Experimenting with fusing different monsters together to create abominations, testing the limits of their biological and magical capabilities.
Altering the magic abilities of characters, either enhancing them to dangerous levels or stripping them away entirely to observe the consequences.
Introducing new diseases, curses, or magical transformations to observe how they spread and affect the population.
Drastically altering the environments within the Underground, such as creating extreme weather conditions, altering the landscape, or introducing new hazards.
Creating time loops where characters are forced to relive the same events repeatedly, testing their responses and resilience to the repeated trauma.
Manipulating the timeline to create alternate realities with different rules, challenges, or ethical frameworks, observing how characters adapt.
Placing characters in survival scenarios where they must compete for limited resources, testing their morals and survival instincts. Like what probably often done with ST3.
Slowly corrupting characters' morals over multiple resets, turning heroes into villains or vice versa, to see how far they can be pushed from their original nature.
Giving characters opportunities for redemption only to cruelly snatch them away, testing their hope and willpower. This is likely something ST1 had been subjected to before.
Chara wants to drill in that the possibility of change or the hope of redemption is completely useless to have. They cannot change, but they can remain monsters with Chara forever. They’re the only ones who’ll have him, after all.
Manipulating characters into forming relationships (friendships, romances, rivalries) only to break them apart later, examining the emotional fallout.
Creating complicated love triangles or other relational dynamics, watching the jealousy, betrayal, and conflict that ensue.
Exploiting familial relationships, such as siblings or parent-child dynamics, to create tension and emotional distress.
By constantly resetting and manipulating these scenarios, Chara could explore the depths of their power and control over the Underground, pushing each character to their limits and beyond, all while satisfying their curiosity and sadistic desires.
