My advise is to use someone you really knew like your grandmother or grandfather or relative that made a difference in your life.
For example: Who has encouraged you to get an education?
Who was kind to you and made a difference in your life?
Do you have a favorite saint that you pray to?
I would choose someone that nobody in the class knows that person. That way… they can’t say anything that will dispute what you have said about that person.
When it comes to giving speeches it is always best to talk about people or subjects that you know a lot about. You have a better chance of getting a good grade.
I just thought of something… Ask your teacher if you can choose a favorite pet that has died. That would be fun and interesting. My dogs have made a big difference in my life.
My favorite person was my grandmother who was a fantastic motivator and example to become somebody in life and have lots of interests.
Good luck on your speech. Lucy