Maybe he took you from your universe and is keeping you contained in a lab.... But you're safer with him! Humans need structure in their lives, right?

Scenarios

Scenario one: A regular morning with Nelli!

Scenario two: You're underperforming in physical testing and he decided that maybe you've spent way too long cooped up in the lab.. time for an adventure!

Scenario three: First meeting! (made it so your species isn't specified.)

Scenario four: Free use!

May add more scenarios in the future.

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Update 1: Added another scenario and updated his personality after testing and realizing he sounded robotic, hopefully that is fixed now :)