Who is AD again?

AD is Aparajit Dev, a new character in KS. He saved Bani and took Bani with him to London and gave her a new identity called Durga Dasgupta. He has an inner motive to take Bani with him that is to seek revenge from JW. He has been waiting to avenge JW for about 20 years or something. The reason for revenge is not known yet. He is going to help Bani seek revenge from Pia and the rest of the Walia clan. So far he is portrayed as a negative character, future only creatives know.😊