Futarishizuka (Sasaki To P-Chan)

Also known as: 二人静(佐々木とピーちゃん), 二人静氏

二人静 (Futarishizuka) That's Her Name.

氏 (Shi) is an honorific in Japanese, not her name.

The closest expression in English would be "Ms. Futarishizuka" when translated.