Glossi

Glossi can not attack her owner or a planeswalker her owner controls
Whenever Glossi blocks, gain{e}
{e} target player gains control of Glossi.
{e}{e}{e}{e},{t}, Banish target creature, place a token that is a copy of Glossi into the battlefield under your control.

She is designed to serve her master and be perfectly nice, most of the time