Every manga and anime waifu ever: "You shouldn't seek revenge, it's wrong and just makes everyone sad."
This girl: "Take revenge no matter what. Do eet. Make him suffer."
When our heroine Elf has a skill to resurrect, can't she just do it on this guy's sister? That's easier to get his trust and should be able to gain his favour to train herself but I didn't get to see it... The Author is really unimaginative.