A hat.
Keiko's family follows a tradition when naming their children. Since Keiko's grandfather was a chemist, he named his son Tetsuhiko after iron (鉄, Tetsu) since Tetsuhiko was born on the 6th of February and the 26th element (2nd month and 6th day) in the periodic table is iron. Tetsuhiko continued this tradition and named his daughter Keiko after the 14th element, silicon (珪素, Keiso), as Keiko was born on the 4th of October but Tetsuhiko couldn't make a girl's name after the 104th element, Rutherfordium, so he resorted to merging 10 and 4 to get 14.
Keiko's display name, Silica, means Silicon Dioxide (SiO2). She chose this name for her character due to her real name being based on silicon, the 14th element in the periodic table. The reason why she chose "Silica" instead of "Silico" was because "Silica" sounded cuter. She even ties her hair with two red ribbons to have 2 ring baubles which symbolize 2 oxygen atoms bound to her.
My new username isn't just because I like the character and find her adorable. She's also just the only character I've ever felt connected to and saw similarities with me and them.
Silica is very bright, (Not trying to sound conceited here. I don't think I'm a genius. I do think I am decent in school though. I am also smart because while my friends are out getting drunk and high, I stay at home and don't ruin my life.) cheerful, (I know I have been down a lot recently, but for the most part I try to stay as positive as possible) and supportive of her friends. She is especially very caring and encouraging to the friend she is very fond of. She also has a very deep attachment for her pet. I feel like all of these things describe me pretty well.
I also like Silica because of my interest in science, chemistry in particular.
So that's the reason behind my recent change. I am very pleased with it and will most likely keep if for a while. I honestly don't see me changing it (or wanting to change it) any time soon.
What is this character from?
...I'm sorry, I'm not very smart...