Destiny seems to have played a huge part the lives of all these characters:
1) Rachita inks a tatoo 'RG' believeing it to be Rohan Grewal or whatever his name was but it was always destined to be for Ramashrey Gupta.
2) Mantu gifts a dress with his first salary to Uma but it was again destined to be with Amaya. Somehow it made its way to Amaya at the rigght time.
3) Hari is the pillar of strength providing support to the mathurs but in a cruel twist of destiny his son is the one who is hell bent on destroying the mathurs.
4) Mantu thanked Amaya for finding his watch (which shows time) but a time would come when he will be shattered due to wish he has granted amaya.
5) The king believes Amaya-Mantu may break-up because of either Sneha or Gajanand. If Sneha fixes Amaya rishta with Rudra Amaya might sacrifice her love for her mothers sake. wherein Sneha you left Banaras and married Rishi indirectly will be fated to be the reason for her daughter's love break-up. On the other hand if Amaya unites the Mathur's and Chaubey's broken realtion then she might be in for a break-up of her love due to Gajanand at a later time.
6) Lastly while Sneha found love by leaving banaras destiny made her daughters find love by returning to Banaras.
*king*