Throughout all the runs in Undertale, two main antagonists exist: Flowey and Chara, though Asriel may count as a possible third. At the start of the game, Asriel and Chara are both "dead," and Flowey was revealed to be Alphys' creation in the True Pacifist Run.
However, they may be another contender for this roster: the seemingly humble, adorable Dr. Alphys.
Alphys manipulates Frisk throughout the game, as seen throughout the CORE when she gives the player wrong advice, seemingly intentionally, and plays them for a sap, as revealed by Mettaton before his boss fight.
Most shockingly of all, Alphys seems to not have any failsafe for Flowey despite knowingly, expertly, containing the Amalgamates and installing an "off" switch on Mettaton. Note that these characters are all kind-hearted and of noble intent; Flowey is not.
Why would Alphys, an intelligent and experienced scientist, not place a failsafe on the most evil of her creations?
Why does Alphys act surprised when Frisk and their friends all find out about Flowey but addresses the situation calmly when Frisk finds her with the Amalgamates in the True Laboratory?
Regardless, even if Alphys has not intentionally unleashed this evil into the underground, Flowey's existence is her responsibility and she would deserve to be held accountable for his actions. Even the best-case scenario seems to show Alphys' true villainy.
What do you all think? Leave your comments below.