One of the main themes is likely feminism. Since it's a 'Femen' graphic novel, it probably explores issues related to women's rights, equality, and empowerment.
One similar work could be 'Persepolis' which is also a graphic novel that delves into important social and personal issues. It tells the story of a young girl growing up in Iran during a time of great change and upheaval. Another might be 'Maus', which uses the graphic novel format to tell a very different yet equally impactful story about the Holocaust.
Yes, it is. Diary of a Pug features the typical elements of a graphic novel, such as sequential art and a visually driven storytelling approach that makes it stand out.
Sure is. Diary of a Wimpy Kid is indeed a graphic novel. Its visual elements add a lot to the storytelling and make it popular among kids and young adults.