Plazma owes her name to the plazma computer screens that were manufactured by various companies and touted to have very sharp image clarity and colour.
She is indeed very sharp and extremely quick!
A coiled spring would not be an exaggeration. 
This was also in keeping with the technological name of her mate Athlon.
She has a character all of her own and is not as prone to wanting cuddles and a simple pat or rub suffices.
She is also an avid deer stalking dog and has managed to notch up 11 kills this year.