Me does love.
I also don't think we need to worry about the mascot needing to appeal to a general audience. The Raspberry Pi has a logo already -- that by itself will represent the RasPi to the vast majority of people. I mean, most people think of Wikipedia's logo, and haven't heard of Wikipe-tan. I think Princess Raspberry "li'l' " Pi will likely be the same, only a bit more known.
And I don't think it'll draw people off. I mean, yes, we should make an effort not to make it "too girly" or "too boy-y", at risk of turning off some of the less mature kids, lest they get cooties. I just don't think that merely giving to mascot a gender will be enough to do that.
Yes, only half of the target audience will be male, or female.
On the other hand, I think very few of them indeed will be non-gendered.
Also, I look forward muchly to seeing her brother!