If you are talking form a grammatical point, the subject of "the warm inventor" would be the word "inventor".
Answer: Scabbers is Ron Weasley's pet rat, who once belonged to Ron's older brother, Percy. Ron claims he's useless because he sleeps all the time, though he did wake up to bite Gregory Goyle in Ron's defence on the Hogwarts Express.
Explanation: hope this helps <3
1st blank- When
2nd blank- where
3rd blank- When
4th blank- What time/When (could be either)
5th blank- Who