Searching for a specific chatbot

Hello, everybody. I once stumbled upon a chatbot, that I can’t find anymore now. If I remember correctly, it had the upper body of an anime girl displayed in a window above the chat box and reacted to what you wrote in few ways. It also had some Portal easter-eggs, which is rather common, i think. I think it had some japanese sounding name. It also had different settings. The setting with the girl and something that looked like a calculator (for mobile users?).

I know, it is basically nothing to work with, but if anybody knows the chatbot I mean, please send some links to it. Maybe it got a complete overhaul over the years. The last time I saw this bot was about 1 or 2 years ago. (I didn’t have a computer since then and the version in the mobile browser was a pain)