The Word -Biddable

"You would do well to be more biddable, Kolt." Yorvet threatened in a low tone.
Kolt rolled his eyes. "Or what? You'll horsify me again? I told you you could. Lugging a wagon around seems a lot easier than this stupid training. You can get your biddable servant than. A horse that can't escape his harness."
"You can't escape this one either."
"I'd like to believe I can, don't go bursting my idealic bubble."

Biddable - 1: easily led, taught, or controlled : docile 2: capable of being bid

Added Info -A "biddable" individual is someone you can issue an order to--that is, someone who will do your bidding. The word dates in the late 18th century, and our earliest evidence for it is a quote in the Scottish national Dictionary. There are a number of words in English that do what "biddaqble" does. "Tractable," "amenable," and "docile" are three of them. "Biddable" is often applied to children and indicates a ready, constant inclination to follow orders, requests, and suggestions. "Tractable" suggests characteristics that make for easy guiding, leading, ordering, or managing; its antonym "intractable" (as in "intractable problems") is more common. "Amenable" indicates a disposition to be agreeable or complaisant as well as a lack of assertive independence. "Docile" can stress a disposition to submit, either to due guidance and control or to imposition and oppression.