Her E is like Yelan's except it hits one enemy. Her Q does off-field anemo app for 12s.
12s is comparable to Sayu's Q. As of 4.0, there is still no anemo unit that can apply off-field anemo for longer than 12s (something like 18s or 25s of off-field anemo app would be ideal). This is important as some units like Cyno (18s burst) may want extended anemo subdps for vv shred.
After using Q, she will buff party atk up to 20% if there are 4 different elemental types. So ironically she has antisynergy with her brother, the mono-pyro Lyney.