My wife didn’t show up for court after the first few hearings in 2013 and we were divorced. I want to get married again. Can she reopen the case now? Could she file charges against me? Would my new marriage be invalid if she does anything?

Under Indian law, your wife likely missed the opportunity to contest the divorce by not appearing in court. Your new marriage is valid. She cannot reopen the case or file charges after this long period, unless there were significant grounds for annulment or fraud that weren’t previously known.