None

They're objects what did you expect.

No.

Some characters die and shatter, but no blood to be found

Limb breaking, drowning, impalement-there are many deaths, but no blood or gore; their deaths resemble how you would imagine their respective objects dying in real life.

Some characters are implied to say some hurtful things, but are muffled or cut off before things escalate.

Some references to sociopathy and serial killers, but no swears or other offensive words.

A character says "Ah, shit" but it is pretty unnoticeable and brief.

A character goes to a bar in a flashback.

Charecters have breakdowns and go through traumatic experiences; a character develops PTSD.

ONE is a psychological thriller. Characters get abducted and are forced to compete in a series of poorly thought out challenges and are constantly on edge, to a point where some have breakdowns.

Some scenes feel surreal or frightening.

Some characters feel and act uncannily; Folder moves unnaturally, and Abstracty produces loud, shattering glass noises wherever they go.

Just a scary show, lots of death and scary moments, some intense scenes, and just watching it all unfold gives me goosebumps.