The Sri Lankan was detained in 2015 on suspicion of planning to assassinate the former president.
MPs Ilham Ahmed and Hussain Mohamed Latheef are the latest lawmakers to switch parties.
Former president Nasheed told Reuters the new government would scrap the "one-way treaty."
Nihan was accused of conspiring to kidnap former president Yameen with a fraudulent arrest warrant.
The Elections Commission warned MVR80 million was not enough for the parliamentary elections in March.
The former actor-comedian plans to contest in an MDP primary to seek re-election on the party's ticket.
A 13-year jail sentence handed to the former opposition leader was suspended for review.
The top court concluded a review of Sheikh Imran's terrorism conviction.
Bisham was accused of failing to perform her duties as an independent state official.
Ahmed Naseem previously served as foreign minister in former president Nasheed's cabinet.
Inquiry commissions were instituted by presidential decree hours after Solih took the oath of office.
The two-day festival began with water sports and is due to end with a football match between politicians.
The release of political prisoners on the first day in office was a campaign pledge of President Solih.
The new ambassador of the United States presented her letter of credence to the president.
Nazim said he facilitated a meeting between the MDP parliament leader and former president Gayoom's son.
There are 161 pledges covering 23 sectors.
Some appointments drew criticism over qualifications, allegations of corruption and potential conflicts of interest.
