In Season 1.
Herb's robot, Iron Sissi.
Sissi is usually known for her whining
Has she found out a secret?
Searching a dress for the prom night in Teddygozilla.
Seen in Teddygodzilla.
Sissi, embarrassed that Ulrich takes Milly to the dance.
Opening the door for someone?
Finding a lone rat in Plagued.
Jealous of Yumi hanging out with Ulrich.
Tending to Ulrich's broken arm in the Factory Lift.
Unconscious from X.A.N.A.'s music in Killer Music.
Making Yumi angry.
Being attacked by X.A.N.A.'s deadly smoke.
Shocked she has only one line.
Horrified that the others will crash into the nuclear plant.
Angry at X.A.N.A. Yumi.
Disgusted by Kiwi's surprise kiss.
Bothering the younger girls.
Having trouble with several math problems.
Talking with her father.
Angry that Ulrich chose to go with Milly to the Kadic dance.
Getting dressed.
About to be crowned yet again..
Talking on her cell phone.
Blackmailing Ulrich.
Teasing Ulrich.
Being blackmailed right back by Yumi.
Messing with the younger students.
Trapped with Ulrich.
Sissi is terrified.
Being saved by Yumi. But not for long..
Staying with Ulrich inside the Factory.
Holding a pention in order to get their cell phones back.
Being saved from the rats by Yumi on a bike.
Busted.
Laughing with Nicholas and Herb.
Trapped with Yumi and Ulrich inside the flooding elevator.
Catching Ulrich and Yumi inside the elevator.
Sissi's role play as Juliette in Laughing Fit.
Theo and Sissi meet…
…and fall on top of each other
Disgusted by Herb's robot..
At Kadic.
Doesn't look too happy with the new student in False Start.