I plan on giving my colleague a poor evaluation.
What is your reason for wanting to give her a subpar evaluation?
I want to punish her because she worked only 3 hours every week.
I would suggest talking to your colleague before giving them a bad evaluation, however, based on what you've shared the negative evaluation would not be unfair.
She was like this from the moment she arrived. They make us stay 3 hours later every day since she's not doing anything.
While I still suggest talking to them first, that definitely sounds like a bummer and I understand your feelings and frustration. Ultimately, leave a poor evaluation is your call.