You can check out Janpath market as they have a CRAZY variety of junk jewellery options available. The best bit, it won't burn holes in your pocket and will be available under Rs 200!
Try miniso. They've got makeup products, bags, stationary, etc at good prices
You can give her a nice muffler... For her personality
You can try miniso, beccos, ximi vogue or shop at sarojini or janpath
A miniso product Or earings
Head to Sarojini Nagar - you'll find tons of options and can bargain according to your budget too!
Dont think much go to Miniso
You can visit the below page. They have good unique handcrafted kurtis https://www.facebook.com/Ahaan-Arts-2348380465446421/?ti=as