I should consider if it's related to a viral post or a TikTok trend. Sometimes, users create original content that becomes a meme. Maybe it's a character from a YouTube video or a music track. "Original 2021" could mean it was first posted that year.
I'll start by searching for "Sad Satan original 2021." Maybe it's a satirical piece or a reaction to some real-life events. Satanic memes or characters often come up in internet culture, but the "sad" aspect is intriguing. I recall that memes can evolve over time, so perhaps this was a newer version created in 2021.
Finally, since AI can't confirm the existence of specific 2021 phenomena without prior knowledge, I should mention that details are limited and base the discussion on plausible interpretations from 2021 internet trends.
Another angle is whether it's part of a larger trend in 2021, like the rise of digital art or NFTs. Maybe "Sad Satan" is an NFT with emotional connotations. Alternatively, it could be a response to global events like the pandemic, using satire to express sadness.
I need to verify if there's any official information about this. If not, I should present the possibilities while acknowledging the uncertainty. The user might be looking for analysis, so discussing the potential themes of depression, irony in religious imagery, or internet subculture would help.
Also, considering the user's request for a "proper write-up," they might want a structured article with sections like origin, context, themes, cultural impact. I should ensure the content is organized and provides a comprehensive overview based on available information up to 2023.
I should also check if there's any connection to real Satanism or religious mockery, as that can be sensitive. The user might be interested in the cultural impact or the context of its creation. If it's a dark humor piece, I need to address that carefully.