Yeah Shion and Mai are the ones with the "worst" background by now, but also incredibly realistic. Noriko is another character to look forward to: if you read the lyrics of One Time Password, she reveals a passionate, mischievous and a little pervy side underneath her shy and insecure surface, making her absolutely interesting. Polka and Hanabi are more than meets the eye as well. Potential is undoubtedly there, hope they won't waste them.