Loridiel is a legal starting character.
To all external appearances, Loridiel is a free Lilim that doesn't do much traffic with Hell these days. She spends almost all her time on Earth, generally associating with rather dodgy types who might be in need of help, and in a unique position to provide certain items, services, and knowledge not easily obtained in Hell due to the fact the certain demons who have power would rather that these things remain in their possession alone. Since she's free, and not actively aiding Heaven or hurting Hell, she can't exactly be deemed a renegade, but she's what most would consider a grey. Open-minded Angels with some experience under their belt may make cautious attempts to try and bring her over to their side, while remaining wary of her possible motives at any time. Even more militant Angels would have a hard time pinning her down as positively evil, and killing her would probably result in her getting pissed off at Heaven in general, so the intelligent Malakite doesn't automatically reach for his knife/gun/bag of M&Ms (in the case of Eli's) on contact with her. In any case, she could be a valuable resource, having links into the parts of the infernal lowerarchy that Angels might like to be able to talk to, track, or otherwise interact with.