Souriya is for Anjali cuz his personality and the total goodie goodie nature resembles Kavy and Anjali even said that u r the best person of me.Soham is totally different from Kavy,nothing except the face is like Kavy which Anjali will or does find weird.He's a cool dude someone who ppl might call a bad boy or a naughty boy who doesn't believe in love or family importance while Kavy,Anjali and Souriya do and most importantly he has been with Reeva for the past 6 years and she is madly in love with him and he says she is his habit and it is hard to get rid of habits(Soham said that)and Anjali will find all that weird as all this is not her belief and Souriya is a person who understands her and makes her comfortable.He is a good boy while Soham is naughty and Anjali like good boys like Kavy and Souriya.
But if Souriya is negative then the whole story will change.Soham will become a good boy and be with A.