Myfanwy is the daughter of Oberon and Cymnea.

She holds the titles of Princess of Amber, and Regent of the Cybellelands in the Abyss

Myfanwy is the result of the final attempt by Cymnea to hold onto Oberon. She was not acknowledged by Oberon as his daughter and her arrival gave Oberon more ammunition against his wife whom he accused of having had an affair. Myfanwy was brought up within the Palace under the eyes of her mother and the royal tutors. Oberon was disinterested in the girl. She played with her much older brothers Benedict, Osric and Finndo. After the deaths of Finndo and Osric she became incredibly close to Benedict. He was more of a father than a brother. He augmented her book learning and Courtly lessons by teaching her to ride and started her weapons training.

The disintegration of her Parents marriage and the birth of Eric meant that aged 22, she accompanied Cymnea back to the Courts of Chaos. Word had reached Oberon that his daughter had referred to her new Brother as ‘Prince little by-blow Eric’ and this pushed her exile. Chaos was difficult for her. Environmentally, she could only survive there with the support of the demons of House Ascaris. (this is a small Duchy in Chaos that is close to Cymneaways near Amblerashways and Channicutways/Rexfordways). 

Politically, she survived because she was Cymnea’s daughter and through the continued goodwill of House Ascaris. As a political necessity, she kept a low profile. House Karm was keen to wipe out an Amber heir as a part of their vendetta. She survived the 8 known attempts to kill her – at least some by House Karm. After 20 years (of Chaos time) she was fit to explode. The constant threat of assassination made her alert but weary of the whole damn thing. Cymnea was under pressure to have her married off, she was under political pressure to take the Logrus and had no desire to do so, and she was stifled by the culture of the Courts. She spent her time learning to fight, to dance, to use poisons, to shapeshifter – to be an eligible little Chaosite. Cymnea finally relented and managed to get a message out to Benedict that there was a package for him near Ygg. 

After a time, Myfanwy was smuggled out from the Courts and sure enough her brother was waiting for her. They returned to Amber in quick time. She learned that hundreds of years had passed in Amber and that she now had many brothers and sisters. She was never to refer to them as by-blows. Benedict was emphatic on this point. He tested her swordsmanship and was satisfied and seemed satisfied that she was no plant by Chaos. She was quietly introduced again to her Father who denied her parentage very loudly and publicly and was housed in Chambers near Benedict.

Her existence wasn’t really publicly acknowledged. There was no Trump portrait of her and she was not permitted to walk the Pattern because, according to Oberon she did not have the blood. Under Benedict’s tutelage she improved her sword work and melded her shape changing with her fighting to improve her effectiveness. Her situational awareness is superb. She formally studied strategy under tutors but spent far more time as a student under Benedict. Battles and skirmishes are rehashed with tabletop models but she spent a considerable time in the field with him refighting battles in Shadow. She explored the City and especially the Castle and has a good knowledge of the secret passage ways. She accompanied Benedict on military expeditions so she could test and improve her fighting and tactics. She spent a lot of time in the family portrait gallery studying her relatives – particularly her father. It was here that she made contact with Dworkin via his portrait and he painted her Trump late one night in the dungeons of Amber.

Benedict holds her Trump and obtained a family deck for her. Eventually Myfanwy walked the Pattern. Tutored by Benedict she went down to the Basement with him. After she had assailed the first veil a guard was sent to Oberon by Benedict to advise him that an unknown member of the family was on the Pattern. There was a monumental row when he arrived in the Pattern Room. It could not now be denied that the woman who had just reached the centre of the Pattern was of Amberite blood.

That did not stop Oberon from accusing Benedict of being her father, smashing him across his face with his fist and throwing her in the dungeons for a month. Paulette intervened and she was removed up to her Chambers. Only Benedict really remembers her from her earlier life in Amber. Oberon scarce acknowledges her and Dworkin did so out of whimsy. She is remembered by the very elderly senior servants.

She is tall – more so than any of her sisters but is almost angular in shape. She can and does subtlety change her shape depending on her desire. She has strawberry blonde hair which is long and bound and bright green eyes. Her favoured colours are red and gold. She is extraordinarily graceful in her movements. She flows and this is evident in her fighting and dancing. Oberon’s historic treatment of women and his family disgusts her but she has responded well to approaches made by the Queen and does her damnest not to provoke the King. She has developed a faintly amused attitude towards her numerous brothers and sisters. She harbours some residual dislike of Eric. He constantly needled her until she used the banned phrase on him to start a fight which had to be broken up by siblings. This does not mean that she has chosen any sides in sibling rivalries. She does not like her Father but is careful to neither speak it nor show it.

She loathes Darlene Helgram and is reputed to not invite Prime Minister Dara of Chaos for any state visits. Is supporting Paulette and Random but almost certainly to support her own agenda. Is known to be spectacularly dangerous and has bested Eric in a straight fight. She completely supports her remaining brother and will not hear a bad word said against him. Ever!

Her consistent support of Oberon’s late wife, Queen Paulette (Random’s mother) and to that end has solidly countered machinations by both Darlene and Rilga. She was known to tolerate her friend Prince Gaius of Amber though laughed in his face when he suggested they replace Oberon with Bleys. 

During the Second Civil War (Corwin and Bleys fighting Eric and his supporters) and was accused by Eric, Caine and Julian of being his Gaius’ genius. Apparently she was reputed to be involved in the saving of millions of people in Southern Amber during the Scourging of the North by Gaius.  This was a plot led by Gaius’ son Isaac and reputed to involve others such as Mandor’s son Joseph, Prince Obie and many others. She was to be indicted by Eric but Benedict with a vast army in the Lorraine/Avalon Rock Cluster, threatened to attack Eric if any descendant of Cymnea was arrested, harmed or imprisoned by Eric and his cabal – which definitely including his younger sister.