The biggest difference between Cassandra and Sera in speaking what's on their mind no filters is the Cassandra never crosses into the bitch version. Sera, does
Sera is too dense to contribute anything beyond stupid shenanigans during banter. Varric works because he knows Sera is a moron and plays off of her very well. Solas, by comparison, wants to engage with her on a higher level, but obviously can’t so every exchange devolves into her making silly noises and swearing while he groans.
