This is a follow up to something
That began back there is April 1st,
Where all (of my) OC's cahnged their...
Respect partner and|or assistants, here:

Pricisla's [Iing and Sing] new assistant is...

Here we have...
Dr.(a) Priscila Iing testing her new assistant:
                        Marco (from S.C.A.T. or T.A.C.S.)

There an alternative version to this Drawing, here:

Priscila Iing is testing her new assistant... (B)

There's also a version with Priscila Sing (the other one):

Priscila Sing tests her new assistant... (A)