First you must introduce the person.
For example : Name, Gender, Age, What is his/her relation to you, address, basically just his/her biodata.
Secondly you must describe the person's personalities or behaviour.
For example: what he/she is like, example, smart,friendly,nice,handsome/pretty, etc...
Third, describe why is that person relevant to you.
For example: This person is relevant to me, because she is my bestfriend... and so on..
And then add any relevant information you can find. You can try to google it and do your research.
Pro tip: Let your creativity flow out, do not be afraid to write it out, even if your english skills is not that good. What most important is strike to get marks even if you can't build a proper sentence. Make the dictionary your friend.
Hope this helps :)
If you don't understand just ask.