I wouldn't be suprised if Hikki was doing drugs either. You never know with people
Of course, I personally don't think she's a junkie. I have a fairly optimistic outlook towards people.
This has to be hands down the most intriguing personality combination: retired golden-age enka singer slash hardcore drug dealer. Miike Takashi, your influence is everywhere!
Lesson learned: you never know about people. Especially celebrities.