Obligor

It sounds like a monster in ancient Greek myth. Like...the Obligor lives in the labyrinth next door to the Minataur.

In real life, being an obligor isn't monstrous, though it can be a little scary. Generally speaking, the term refers to the one obligated to do something. As in "I do" or "Sure, I'll adopt that potbellied pig."

In finance, it's another name for the party that takes on a debt.

You want to borrow money to buy partial ownership in a professional crocheting team. You take out a loan of $50,000 for the initial down payment. You are now the obligor in that situation. In other words, you are obligated to pay the money back, per the terms of the loan agreement.