I painted her using colors that would resemble those from WH's original artwork. I don't really have sculpting skills so I didn't even bother trying to create a pilot's cap for her. The base is made of resin and it's from Micro Art Studio (yes, I do like this company's products).
In game she can make Witchling Stalkers much more effective. First of all, if they activate withing 4' of her, they get a free +1wk and +2cg, which significantly increases their mobility. Her Runesword has decent damage profile, rg 2' and gives her a chance to turn an enemy into a Witchling Stalker. She also has two 0 actions. One allows her to push a friendly minion with 12' up to 4' towards another friendly model within LoS. The other has nice synergy with Sonnia as it causes (needs 6 of any suit, which isn't hard to pull off) attacks of friendly models within 4' to apply burning +1 to targets within 10'.