Please add your name, Aadhaar number, emergency contact while in the Kumbh Mela and emergency contact at home. This will make sure that someone can reach out to your family or friends in case of emergency.
To help you understand this better please let us take two examples:
Scenario 1
You are travelling with 2 family members and a friend: In this case, as an emergency contact, you should mention name of one co-traveller and one person at home. Your friend travelling with you, can mention your number as a co-traveller and a contact person at their home.
Scenario 2
If travelling alone or with minors, minors can bear your number and anyone at home, while you can mention both numbers of a contact person at home.