Basically, Leashy was a persona, that turned disturbing after a long time.

This entire time, Leah existed before Leashy, and Leashy tried to ruin Leah (me)'s life, and in fact, the name “Leashy” got so dirty that the Leashy persona made me feel suicidal in real life, and now the only and real Leashy is Leah, and we can call the former Leashy that ruined my life now as “F!Leashy”.

So, this means, you can still call me Leashy, and basically, Leashy is not dead because, I'm Leashy, the only thing that is canonically non-existent now is F!Leashy which is fanon and not canon at all anymore, unlike Leah, Leah is canon.

There's still NO Leah design made because I suck at art and no one wanted to help, so all you guys have is your imagination. Without design, it's hard to make a “Persona Information/About me” article without the help of anyone, so Leah is basically blank for now.