In an interview with Good Morning America on Thursday, Elyce Arons opened up about her friend -- whom she called Katy -- and her legacy.
"I have a really hard time calling her Kate because that came about through the business, but I had known her for so much longer than that," Arons said of Spade, whom she met at the University of Kansas.
"It was tough because she didn't always say it," Arons revealed of her late friend's battle with depression. "She'd be sad and then one minute later she'd make a joke."
Arons, who was also Spade's longtime business partner, said that her friend was generally happy. "We talked every day and most of the time she was very happy," she said. "But I don't know if anyone can understand the depths of depression of another person."
As for remaining questions, Arons just has one -- "Why?"
"I have thought and thought and thought about it, but I think it was probably one moment of despair, of deep sadness that she felt while she was alone," Arons said. "I can't answer what that was."