클라라는 가더라도 저는 안 올 거예요.
Please tell me if my use of '더라도' is right. If it's not, then please explain to me how to use it. Thank you.
It's a grammar point connected to the verb stem, and basically means 'even if ....'. In your sentence, you're saying: Even if Clara goes, I am not coming.
Check this link for a more in dept explanation with examples: https://www.howtostudykorean.com/upper-intermediate-korean-grammar/unit-4-lessons-92-100/lesson-99/