an anthropomorphic pink dog in a jester halloween costume does die in the mysterious house, but it’s never shown, only its mutilated body appears and you can barely even notice it’s a dog
not ‘abducted’, but may still be triggering as 2 children are taken to party by family friend and are killed in an accident, driver hides bodies from families
multiple points of the show have loud, disturbing screaming segments
episode 2: faint screams of young girl as she is assassinated
episode 3: man screams after surviving a car accident, and more recorded screams of another woman being tortured
While no character is explicitly being stalked, there is the implication that the "killer" character of the series is looking for/hunting our main character.
Tricky, as the main villain is the protagonist's father and he definitely intends to hurt her once he finds her, but circumstances make it difficult to say whether it's really abuse, and it's stated that the main villain was a decent father in life. Also, in the Halloween special, a pair of children die horribly.
A woman is killed in a gruesome and violent manner by what is heavily implied to be her husband, but the circumstances are such that it's difficult to say whether or not this counts.
You might because of how many flashing lights there are <//3
actually tho there are no characters that have a seizure but the spasming of the robots can look similar to someone seizing
While there are several characters who are killed in the series who have been confirmed to be canonically LGBT+ by the creator, there is no instance of an explicitly LGBT+ character being killed.