Didn't make a lick of sense to me, perhaps because I'm unfamiliar with the source material. However, I like the way the shaggy-haired girl is drawn, and I always like glasses girls.

I went and read the first one (figured it had to have one since this one was labeled "2"). It made more sense in that regard but as I am also unfamiliar with the source, I had no deeper understanding of it beyond "they work together and got hit in the face with the Yuri Train" lol

Yeah, the fact that this is based on the anime Vivid Strike, a sequel to the manga/anime Mahou Shoujou Lyrical Nanoha ViViD, a sequel to Mahou Shoujou Lyrical Nanoha StrikerS, a sequel to... kinda does land you in the deep end, characterization-wise.

The glasses-girl, Jill, is original to Vivid Strike; the other, Nove, goes back to StrikerS. Nove actually sums up her situation pretty well; she's both a cyborg and a clone, and if you think of the JS Incident she refers to as a large-scale terrorist attack, you won't be too far off. The protagonists thwarted the worst of it, she was arrested and rehabilitated, adopted by the widower of her genetic original, and as of Vivid Strike runs a gym for vaguely pubescent magical prize-fighters. Simple!