So, [@Chrononaut]. You're right about Stabi being the better candidate. There's a few issues I found in her sheet, but before we get to those, there are two major problems I want to address.

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1. I think it's better for you to focus on Raelyn instead. She has a lot of potential, and you can milk a lot of quality content out of her. Opening up another character with its independent story arc will not only divides your time, but also requires others to integrate her as well. I am quite busy currently, and it seems like [@Leidenschaft] and [@Dervish] are as well.

2. Stabi is very peculiar. While she is not overpowered or lore-contradictory, I do find a mercenary group an unlikely fit for her. Unpredictable mode of operation combined with poor Cyrodilic language skills are going to be major obstacles. 
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I recommend playing Stabi out as an NPCs rather than a full time character. I'll need you to change a few things if you go this route, and if you do that, you may start her off in the same stage as [@Frizan]'s Piper.