AN: This is set in GreenGecos universe, where Snape is Harry's guardian, and his patronus in a Egyptian Cobra.
I'd practiced becoming an animagus ever since Harry showed me my patrones. My happy memory had been being with Lilly. Unfortunately, Harry walked in while I was practicing becoming a cobra.
Little snake, what are you doing in Snape's office. Tell me your business here, or I hex you.
I was surprised Harry could talk to me, then I remembered that Harry was a parseltonge.
Harry, I'm practicing being in my animagus form. I hissed, hearing the hissing behind my words
Ah, Father, sorry I interrupted you. I haven't spoken in Parseltonge in ages.
Just don't tell the rest of the school, Ok?
Yes Sssir.