Wyndleblade

I agree but you know Sanderson: Chekhov's Gun

@Randall ThorIt was not stated but Taravangian mentions using Malata's spren to spy on Dalinar in order to find secrets.

From the beginning Malata seemed a shifty character to Dalinar and Navani. On her first visit to Urithiru, Dalinar confides to Navani, "I don't like her smile" and questions if she has an honor blade instead of a spren (which is false). Because of how she acted they never trusted her with more than opening the Oathgates (although even that trust was a mistake). There are also stereotypes surrounding Dustbringers as their main surge of destruction is commonly associated with Voidbringers.

While Dalinar stole the show, I still enjoyed Lift scenes better. It was always a mystery where she would show up next and yet looking back on it she always showed up right when she was needed.

Malata was Taravangian's inside informant. Her Ashspren helped find Dalinar's secrets that caused the collapse of the coalition. She was also the one who unlocked the Urithiru/Kholinar Oathgate letting singers in.