Aditi, who is coming into the tournament after playing in the World Amateur Team Championships, shared the lead with overnight leader, Amandeep Drall (74) at 148.
Closing in on the leaders at the Golmuri Golf Club was Millie Saroha (75, 75) in third place, just two shots adrift. Another one shot behind was Raksha Phadke (75, 76), also a member of the National Squad like the top three.
The 14-year-old Aditi, who also leads the Ladies Order of Merit, but is still eligible for Category B, was actually two-under for the day when she came to the 18th tee. She had earlier bogeyed the par-5 seventh, but picked up birdies on the par-3 10th and par-3 16th. Then she again bogeyed the par-5 18th.
Meanwhile, overnight leader, Drall added a second straight 74 and she had one birdie on the par-4 sixth. She was done in by a double bogey on par-5 seventh.
Gurbani Singh (76, 77) was fifth at 153, while Nanaki Chadha (73) made up for her lacklustre first day round of 82 with a good round of two-over to move to sixth place at 155.
Millie Saroha led Category A with a total of 150 and Raksha Phadke was right behind her at 151, but in Category, as also combined A-B, Aditi moved into the lead position at 148.
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In Category C, Riya Ahuja maintained the lead with rounds of 83 and 85 and she was followed by Arshia Mahant (89, 88).
The lead was unchanged even in Category D, where Tanishka Kumar (84, 91) led second-placed Vasundhara Tihara (89, 91) by seven shots.