How far can the character Wikus be related to that of Biko, and his role to abolish apartheid?
I've recently realized the similar phonetics of the name, so it rang a bell and the question immediately arose.
Your parallel is slightly off. It's not Biko that Wikus is related to but Biko's friend, Donald Woods from "Cry Freedom".
Both Wikus and Woods were initially of the governing race, and both started with adversarial relationship to Biko/alien known as Christopher Johnson, only later to turn into friends.