YMMV: Blood Stain
- Alternate Character Interpretation: Sigeel intentionally asks the readers whether they think Dr. Stein is Obfuscating Stupidity or if he's genuinely an Absent-Minded Professor in the description for page 43.
- Awesome Art: The webcomic's creator is a professional artist, and her skill in both art and page composition show in the work.
- Crowning Moment of Funny: Anything to do with Serge's coffee.
- Germans Love David Hasselhoff: Sigeel noticed that Blood Stain rose to top ten in popularity very quickly on the Russian site Top A-Comics.
- Hot Scientist: Dr. Stein has quite a few fangirls according to the comment sections. Sigeel is apparently amused by this, and occasionally draws tongue-in-cheek fanservice of him.
- Shipping: If the comments are any indication, Dr. Stein and Elliot are often shipped together. For Valentine's Day 2014, Sigeel drew a non-canon Ship Tease image of the ship.