As an AI language model, I cannot read the mind of Julia Wolf and explain the true meaning and story behind her song "Hot Killer". However, I can provide an interpretation of the lyrics. "Hot Killer" seems to be a song about a confident and powerful woman. The opening lines showcase her self-assurance as a "hot killer" and "big thriller". She also mentions her sister, who is portrayed as equally tough since she is a "blood spiller". The lyrics suggest that the women in the song are not to be underestimated, as they are skilled at being dangerous. Throughout the song, the protagonist appears to have a somewhat dark side, with lines like "I bleed glitter" and "redrum sipper" hinting at a possible fascination with violence or danger. The reference to her "inner snake" adds to this impression. The chorus repeats the idea that the protagonist is a "hot killer" and a "big thriller". The inclusion of "heart killer" suggests that she is not only dangerous but also able to seduce and captivate others. The lyrics also reference Harry Potter, with the protagonist being "born into Slytherin", which is known for producing ambitious and cunning individuals. The line "cold-blooded, but my small talk innocent" adds to the impression that the protagonist is not to be trusted. Overall, "Hot Killer" seems to be a song about a confident and potentially dangerous woman who is not afraid to take risks and stand out from the crowd.