Saki is Hachiman's classmate who seems like a delinquent, but wants to make friends deep down. She cares deeply for her brother as she hid her name and age to work in night-shift part-time jobs in order to pay school fees and reduce her family's load. After her brother asked help from the service club, the service club eventually followed her to her workplace and found out her motives behind working night-shifts, she stopped working after the service club suggested her to aim for a scholarship instead. (Source: Wikipedia)
Hachiman's former associate and schoolmate. He suffers from chuunibyou and is an aspiring light novel author, though his writing sucks.
She is Hikki and Yui's classmate who is very popular in their class. She holds herself with such high esteem that she manipulates anyone who admires her, most especially Yui whom she treats badly. (Source: Otaku-streamer)
Yamato is one of Hayato's friends. He is in the rugby club.
Kakeru is one of Hayato's friends. He is in the football club. He has feelings for Hina and is the only guy in class who often supports Hina's scripts. (Source: Wikipedia) During the school trip, he tried to confess his feelings to Ebina and ask her out, thus he asked the Service Club for help. They reluctantly agree, even though they all suspect she will turn him down. Later on, Ebina herself appears in the Club and asks Hachiman for help, indirectly asking him to "set things right" so that things wouldn't get awkward between her and her friends when she turned him down. He then solves the problem the only way he knows how: by sacrificing himself in front of everyone. Thus resulting in him getting hurt and hurting Yukino and Yui's feelings, and almost leading to the end of their friendship.
My Melody, the main protagonist of the series, is a rabbit from the forest of Mari Land. Throughout the show, she is shown wearing a pink hood that also covers her ears. With adequate cooking ability, My Melody is the one who prepares meals for Uta and her family. Her nickname is My Melo. The magic that comes from her tact can only be used as an antidote to Kuromi's spell. When she waves the tact, a small heart sticker attaches to an object and brings it to life. The animated object then helps to reverse the effects of Kuromi's magic. Sometimes, the animated object won't be able to perform the specific task it needs to. My Melo will then smile at it sweetly and say, "[object name] Onegai?" ("[object name] Please?"). This causes the enchanted object's power to intensify, sometimes increasing its size. Surprisingly, even Kuromi has become one of the things Melody used her magic on which was seen in one episode. As a very cheerful individual, My Melo is never seen angry. She can be a bit scatterbrained and oblivious to things though. She also doesn't seem to have any affections for anybody the way Kuromi and Uta have for Keichi, although she is quite fond of Usamimi Kamen. To travel from place to place, My Melo uses a pink umbrella which enables her to fly. This was until Kuromi stole and used it to go to Mari Land. Since then, she started sharing with Flat's umbrella. She regains it back in the second season though. She has two magical items. The first one is the Melody Takt, which she uses to cast magic by waving it like a maestro's baton. In ~Kurukuru Shuffle!~, the Melody Tact was upgraded into the Hyper Melody Takt by the king, but in Sukkiri♪, it was destroyed in the final battle, making it useless, although it was repaired a short time later by the Melody Box. The second is the Heart and Star Pendant, which appeared in Onegai My Melody Kirara★, My Melody uses it to do magic along with Kirara.
She is a small, determined and fiercely independent Mymble. When she wants something done, she does it straight away. She is very aggressive and totally disrespectful, but can be a good friend. She has a brash personality. She is Snufkin's half-sister and later Moomin's adopted sister. (Source: Wikipedia)