Funny story: For me, graphics always came before characters, up until I could finally hire someone to make the graphs. For that reason, Hana's old graphic (even older than the previous one) was just a sad girl with black hair. As a result, her initial character was shy and introverted.
Since I got the previous graphics and I had much more freedom with her expressions I changed her to be a lot more spunky, and her old personality was largely transferred over to Kaliska.