The artist said, "Here, eat a melon bun. It'll make you look like even more of a b****."
Mika Kanai voices a lot of cuties and genki girls in anime. She is famous as Melonpanna from Anpanman, Mimete from Sailor Moon S, and several Pokémon in the anime of the same name.
Mimete is another member of the Witches 5, an evil counterpart to Venus, and bar none the most useless and weakest Witch. She was responsible for murdering Eudial and setting back the Death Busters since the latter knew the of the Sailor Guardians' identities and their possession of the Holy Grail. Mimete killed Eudial because she "kept failing", when all Mimete cared about was chasing after her idols and becoming a celebrity (she is one in the manga and Crystal). Like I said before, the Witches 5 were smug backstabbers who only sought for personal glory, and Mimet is no exception; besides killing Eudial, she tried to sabotage Tellu when the latter was going to replace her. Mimete may have acted cute and sweet, she was a callous woman child who ended up with a fate worse than death. She was threatening, however, with her Daimons (the monsters of the day in Season 3) sucking Pure Heart Crystals directly out of the victims' mouths. (Even if her main targets were exclusively men.)
In the Viz dub, Mimete is played by Kira "Rina-Chan" Buckland, who is known for voicing Twilight Sparkle in MLP fan animations (including Double Rainboom, Twilight's Nightmare, and PONY.MOV), Primrose in Snowdrop, Toph Beifong in Death Battle: Gaara VS Toph, and Marie from Skullgirls.
What Mimete is holding in her hand is a melonpan, a Japanese sweet bun baked to resemble a cantaloupe. This is done by baking an enriched dough with a thin layer of crisp cookie dough on the outside. Melonpan aren't always melon-flavored, but they can be and also come in many varieties such as chocolate chip, maple syrup, and cream-filled. Melonpanna from Anpanman is one of the bread heroes, and she is the first female among them (and the only one until later). Her special attack is "Melo-Melo Punch!", a pun on her name and "Melo-Melo," the Japanese onomatopoeia for love/infatuation. Melonpanna also has a big sister named Rollpanna, who happens to be one of my favorite characters in fiction.
Speaking of "Melo-Melo", it is the Japanese name for the move Attract, which Iris' Emolga knows. Iris' Emolga, like Mimete, puts on a cute act to satisfy her selfish needs (like her appetite for apples). She is not above using Attract to get away with her mischief, though it only works on boys. However, Emolga does become nicer later on in the Black & White seasons even with her sneaky humor and rivalry with Ash's Snivy. Emolga is a skilled battler, but she prefers to let her teammates do the dirty work via Volt Switch.
Kanai also played two Pokmon that can have the Cute Charm ability: the recurring Jigglypuff from the Original series, and Serena's Eevee/Sylveon. Jigglypuff is known for its beautiful song and habit of drawing on people's faces when they fall asleep. It was such an entertaining character, and it's kind of a downer that it appeared less and less until it disappeared altogether after one appearance in an Advanced Generation episode. There's still Smash Bros...
In the X&Y series, Serena caught a female Eevee, who was often used in Showcases because of her dance skills. Eevee was very shy and often doubted herself, but once she evolved into Sylveon she became much more confident as a performer and battler.
While not related to hearts, Kanai also voiced Ash's Chikorita/Bayleef. She was clingy of Ash and jealous of Pikachu, but she grew out of it once she evolved into Bayleef to save him from Team Rocket. It took a while for her to get used to her new size, since she didn't know her own strength.
Sailor Moon belongs to Toei Animation and Naoko Takeuchi. Pokémon belongs to Satoshi Tajiri, Game Freak, Nintendo, and The Pokémon Company.
Kanai was once married to fellow voice actor Koichi Yamadera, the voice of Cheese the Dog and Kamameshi-don (Anpanman), Vincent Brooks (Catherine), Shuu (ME!ME!ME!). He is also basically the John Ratzenberger of the Pokémon movies (Mew is one of his best-known roles). He is also the Japanese voice for many Disney characters (Genie, Mushu, Stitch, Donald Duck, Beast, Sebastian) and several actors (including Robin Williams, Jim Carrey, and Eddie Murphy). Kanai and Yamadera have since divorced.