Not Every Nun is Julie Andrews
The Nun is strolling along the hilltops, but don’t assume anything further.
This is not a musical, and she is not singing. She was kicked out of the choir like Maria, but she acknowledges that her dismissal was fair, as she does not sing in tune.
She is simply taking a calming walk before going to the church to pray, but she might hit a snag when she gets there – the queue from the wedding stretches all the way through town.