She wasn't the original Fujiko, that was Eiko Masuyama and Yukiko Nikaido only got the role in Part 1 as Osumi wasn't happy with her but still her role as Fujiko did have many fans and loved her performance (The Emerald's Secret is the only time both Fujiko VAs were in an episode).
Apparently she had been suffering from dementia for around 13 years and that's such an awful staggering slow way to die, even the thought is upsetting. RIP and I really don't want to say this, she wouldn't be suffering anymore and would be at peace. At least her legacy will continue with the nature estate that she co-founded and having something like that deserves to be remembered on top of her Fujiko role.