Silvana's original design was going to be Elf instead of a Catgirl! She was going to remain an Otaku character however, but be very tech savvy and a Catgirl fanatic, so she'd have a holographic tail and ears but everyone I explained the concept two didn't really get it.
The Elf and the Catgirl fanatic trait are both things that ended up in Linnaea, so I guess that idea did see the light of day in the end-