The correct order of events from earliest to latest is:
1) Olivia rejects Orsino and prefers Cesario. 2) Antonio risks danger bringin Sebastian to Illyria. 3) Olivia mistakes Sebastian for Cesario <span>4) Viola is astonished to see her brother.</span>
1 - Olivia rejects Orsino and prefers Cesario.Olivia gives us an idea of Malvolio's character by saying that he suffers from self-love or is arrogant and vain.
2 - Antonio risks danger bringin Sebastian to Illyria.Antonio, the man who saved Sebastian's life is touched by Sebastian's loss.
3 - Olivia mistakes Sebastian for Cesario. Sebastian has now reluctantly accepted Antonio as his companion in the streets of Illyria.
4 - Viola is astonished to see her brother.In the house of Olivia, Malvolio in a darkened room is teased mercilessly by Feste who tries, without success, to convince Malvolio that he is crazy.