What pact could a Warlock make with Sarenrae, The Everlight?

I'm writing a character which was forced to enact mass murder against their will and still believes their actions were unforgivable, so they are seeking atonement. But I challenged myself to make that character a Warlock instead of a Cleric or Paladin. I find myself wondering if Sarenrae would even make a pact with someone. Does she need a warlock? I love the character concept and also love the Warlock class. I'm really trying to make these two work together and need your great reddit minds to help me! What pact do you think Sarenrae would make with a Warlock?

Edit: I'm referring to Exandria's version of The Everlight. We are playing in Wildemount.