Socialist MSP Rosie Kane was among 10 protesters arrested during an anti-nuclear demonstration outside the Scottish Parliament.
MSP Rosie Kane was arrested and later released
She was one of 30 campaigners who set up camp inside a mock submarine at the foot of the Royal Mile in Edinburgh.
Police moved in at about 2200 GMT and arrested three men and seven women.
They were held at St Leonard's police station in Edinburgh overnight and two people, including Ms Kane were released at 0630 GMT on Friday.
Glasgow regional MSP Ms Kane declared the protest a success.
Back at her desk at the parliament on Friday, she said: "It was the right thing to do and I think we made an impact.
"There was lots of discussion with passers by, some who were supporting us and others who were against us.
"There's something to be said for politics on the street - many people could see what was happening outside the Chamber but they probably don't know what was going on inside.
"The executive have turned their back on the issue and yet the majority of the Scottish people, over 70%, are opposed to Trident.
"This is an issue for the Scottish Parliament and our presence made that clear."
Ms Kane said the protest was a "warm-up" to the G8 summit.
'Perfect training day'
"Leaders are responsible for the ills of the world and Trident is one of these," she said.
"This was a perfect training day for the police in which everyone was respectful, peaceful and non-violent."
Ms Kane will appear at Edinburgh Sheriff Court on 31 March charged with obstructing a roadway and resisting arrest.
She said: "I will be looking for a reward. I am not guilty of a crime, but of highlighting a crime - Trident."
The protest was organised by the Trident Ploughshares group, whose members hastily assembled the 25ft plastic structure on the road on Thursday morning.
A spokesman for Lothian and Borders Police confirmed that three men and seven women protesters had been arrested for an alleged obstruction of the roadway.