He is Abhishek Thakur, supporter of BJP.
He is roaming around Jantar Mantar with other goons and beating protesters.
If you see him around, you better know what to do.
IMPORTANT ANNOUNCEMENT
BJP-linked goons like this person, Abhishek Thakur who has several FIRs in UP and is close to BJP leaders are active in Delhi to create mischief.
Please beware of such elements.
Hope @DelhiPolice will not let him roam with the streets with a lathi