Thank you Kahurangi for that amazing summary

It seems luck finally smiled on me today, rolled the SSR* Evil Kaiser Dragoon Eidolon.

Now she is SSR, so I am keeping her for the moment, but should I keep her or still go for a R* princess ? (since R princess is the best we get from the gacha, to my understanding at least, dont think anybody mentioned if its possible to get an SR Princess from the pre-reg pool).