At first Griffin appears to be an antagonist to the Winx Club, being supportive of the Trix and their meddling with the fairies.

She first appeared to welcome the new students into Cloud Tower. Later, when Alfea and Red Fountain had their dance party, Griffin collected ideas from the young witches to ruin their party. Of course the Trix's idea was the best one, though she didn't know that they had plans to steal Stella's ring. The plan was unsuccessful, which made Griffin angry.

Later, when the Winx broke into Cloud Tower in order to take back Stella's ring from the Trix, Griffin were alerted of their presence and started to play dangerous tricks on them and later informed Faragonda about their break in. Faragonda grounded the Winx and revoked their powers. The Trix then broke into Alfea to take vengeance for trespassing and also to find the Dragon's Flame, but were caught and sent to Griffin by Faragonda with a letter, much more to Griffin's annoyance. However, she did not punish the Trix, but instead gave them a mission to break the bonds between the Winx and the Specialists on the Day of the Rose festival. Darcy managed to turn Riven against the others.

At the end of the year, she held a test for the young witches and Mirta was tested, she was hesitant but she was able to answer correctly. Griffin reminds her that she needs to be confident if she wants to be a good witch. After Mirta was turned into a pumpkin and was taken to Alfea, Griffin did not seem to notice her absence. After the Trix failed her again by getting caught at Alfea after sending a giant nightmare monster to attack the Winx, Griffin had had enough of them and expelled them.

She attended Red Fountain's Exhibition, wondering if it was a good idea to expel the Trix, since she now cannot keep an eye on them.

She sent the Trix to the Fortress of Light to punish them. Faragonda invited her to Alfea's party, but Griffin declined the invitation.

Griffin attended Musa's concert at Red Fountain and was even seen dancing there, much to the amusement of Saladin and Faragonda.

When the Winx temporarily joined Cloud Tower as exchange students, to help protect the second piece of the Codex found there, Griffin along with other teachers taught them the dark arts of magic.

When the Trix thought that the Codex was inside the Heart of the Cloud Tower, Griffin went to the heart to take back control of the tower from them. After the Trix retreated, she made the Winx girls split into groups of two, each composed with the girls who could not get along with each other so that they could learn to work in teams better. When asked questioned by one of her teachers, her answer was that it was to make them grow. She returned back to the Heart and soon managed to regain complete control of the tower and attempted to imprison the Trix inside it. When the Trix stole the Codex, Griffin watched the Winx and Mirta return to Alfea and knew that their friendship might have weakened a bit.

She later participated in the final battle in which Darkar was defeated. She helped Faragonda and Codatorta fight off Karborg. She and Faragonda powered up Codatorta and he defeated Karborg for good.

It has been shown in season three that Griffin used to fight alongside Valtor, and served the Ancestral Witches. But later her conscience made her regret her actions and she later joined the Company of Light. She stated that since then she has spent most of her life trying to repent herself for her errors and correcting them.

Later, she was in her office doing work, when she suddenly thought someone was behind her door. She took a peek but saw no one, she instead saw Valtor sitting in her chair when turning around. Valtor tells the Trix about his and Griffin's past with the Ancestral Witches. After that she was imprisoned, while her students were possessed and her spells were stolen by Valtor.

She was seen again when the Winx attempted to take revenge on Valtor because of what happened to Tecna on Andros, Stella and Aisha discovered Griffin in the dungeons and Stella used her fairy dust to break the barrier spell on the door. Griffin was free, but the Trix arrived immediately and attempted to lock her up again, but Griffin quickly sent them to the detention dimension. They then headed to her office, where Bloom was frozen by Valtor's Oppositus spell that turned her fire spell into an ice. Faragonda, Griffin and Saladin use their powers to create a barrier around Valtor while the Winx attempt to free Bloom with their fairy dust. As Bloom was freed, Griffin along with others backs up when the fire spell burns Valtor badly. She is then teleported to Alfea along with others by Stella.

After Valtor had all that he wanted from Cloud Tower, he left and the witches were freed from his grip. Griffin returned, but was troubled by Valtor's whereabouts. She then tells her students that they need to unite with the fairies and Specialists to end Valtor for good.

When Valtor challenged Griffin, Faragonda and Saladin to battle, he made Cloud Tower disappear much more to Griffin's anger. Griffin accepted the challenge, even though she did not have anything to offer Valtor if she looses (though Valtor possibly challenged her to get revenge on her betrayal). The four of them met in the woods and Valtor cast an illusion spell, which made Griffin and the others see each other as Valtor so they could finish each other off. With the distraction set, Valtor went to Alfea to steal their spells. Unfortunately for Valtor he was prevented from doing so by Bloom and the Water Stars, his spell broke and Griffin, Faragonda and Saladin realized that it was a trap. After returning from the ordeal, Griffin stated that if the spell had lasted, she would have defeated Faragonda and Saladin for good.

The Winx soon went back to Cloud Tower, realizing that Valtor actually hid it behind an invisible wall rather than destroy it. After Cloud Tower was back, Griffin was glad to return there again.

When Valtor was angered by the Trix, he proved his powers by using the Spell of the Elements to destroy Magix and the three schools. He dried up Lake Roccaluce and sent the water to flood Cloud Tower, fire to Alfea, air in the form of tornadoes to Red Fountain and earthquakes to Magix City. After his spell was broken, Griffin was astonished and annoyed to see the damaged done to her after the water returned back to Lake Roccaluce.

Griffin was first seen in the second episode as she welcomes the new freshmen witches at Cloud Tower where she prepares to gauge the abilities of the new students. She selects Selina to demonstrate her powers with the Legendarium, and was shocked at what it was capable of. Soon after, the Trix crashed the school, whom Griffin was not happy to see again. Despite her efforts to fight the three of them off, Griffin was defeated and transformed into a crow. Before she could get captured, she quickly flies off to escape. Unfortunately, Griffin gets struck by a lightning bolt but was saved by the Winx, who bring her to Alfea for treatment. With the help from Roxy, Griffin managed to convey a bit of a warning about the Trix to Faragonda.

In "The Lost Library", Roxy asks The Winx for help to return Griffin to her real form, Flora attemps to break the spell but fails.

In The Secret Greenhouse with the help of Palladium, Roxy returns Griffin to her original form however Griffin was woozy and nearly collapsed, but is caught. She insists on seeing Faragonda quickly, but Palladium has his students take her to the infirmary to recover. Later At the Alfea infirmary, Griffin tells Faragonda and Palladium how the Trix had taken over Cloud Tower and how they plan to take over all the schools in the Magix Dimension. Faragonda assures that they will be stopped. Sky then walks in and asks Faragonda about the whereabouts of the Winx, bringing up his concerns about Bloom's friend, Selina. Griffin's eyes widened at the name and quickly tells them all that Selina is in the employ of the Trix.

She only makes a cameo in this special when Stella introduces the three magic schools on Magix to Bloom.

She makes a brief appearance as she is seen watching the Exhibition at Red Fountain and also witnesses the disturbance of the Exhibition caused by Bloom and Diaspro. She then says that it is not only just her students who can behave badly.

She appears at the beginning of the movie, as co-host, along with Faragonda, of the beginning of school year celebrations.