How do you think that she is an INFP or an ISFP? I dont think she was a Fi- in first and dominant function. She must be an SP, but she seems NOT as a F-person, she was pretty direct/daring in her opinions, tough and highly self-comfident. But when she fell into depression and experimented with the drugs, she wasn't very strong at that time and she became extremely vulnerable, but that can happen to anyone, even the most stabile persons can become vulnerable. Dont let us forget that she was an extraordinary artist, and that can often be highly discussed in a conflict between F/T-traits. I say ESTP or ISTP.