|Captain Lady Arran|
- "He'd only laugh" - Arran
She is described as having light colored fur, like Urchin's, and spiky tufts on the top of her head that she is not fond of, and she had a sharp face. During Urchin and the Rage Tide, she broke her shoulder as is told that it will never be the same.
Arran is a sensible otter and very thoughtful. She also has a more severe side, as when she went about fixing a boat for the exiled Captain Crispin, she remarked sharply that if anyone rebuked that she'd send them to Padra or even worse, they'd have to answer to her. As a Captain of Mistmantle, she is very brave and is also a very good mother who always thought of her children. So much so, that she asked to be relieved of her Captain duties in order to spend more time with her youngest daughter Fionn while she was still young and have the time to support Tide as he pursued his training as a Priest.
She first appears after Crispin's exile and Urchin is sent to find Arran by the Spring Gate by Padra to help with Crispin's perparations. She gives the captain her own boat, it being the best on the island, and helps to store food and his cloak, circlet, and sword under one of the seats. She is seen crying when Crispin is exiled, believing him to be innocent.
It is common knowledge in the Tower that Arran has feelings for Padra, and vice versa, and they are often seen together. Mother Huggen often encouraged Arran to ask Padra to marry her. However, Arran always replied, "He'd only laugh", also being uncertain of Padra's feelings for her.
Arran helped Padra and Lugg rescue the culled-to-be babies and organized babies' escape from the Mole Palace when Tay found it. Arran was later put in charge of the food stores along with Padra and managed to prevent Husk's plans to cut down dispensation of food.
During the battle against Husk's forces, Arran saved Padra's life many times and Padra told her later he was impressed. He then asked her to marry him. Arran hit him and Padra laughed-he had long thought she would hit him if he asked her, just as she thought he would laugh. Crispin appointed Arran a captain of Mistmantle, along with Lugg.
- "...Padra and Arran had a very simple wedding early in the morning beside the sea and celebrated with a long swim afterwards. Brother Fir married them and not many people were present – Urchin, and Crispin, of course, Needle, Fingal, Hope, and a few close friends. They asked Sepia to sing. Then invited all the island to a party later that day. It was summertime, they were all on the shore, and there was a lot of fun and splashing."
- -From an email sent by Margaret McAllister on October 3, 2017.
Arran is shown to be pregnant with Padra's children.
When Urchin finally returned, she was so glad that together with Padra and Fingal she swam to the ship and hauled it into the jetty. She and Padra later came into Urchin's room as he was sleeping and noticed his bracelet, made from the fur of his mother.
Arran is first seen eating with her family on the beach before a night of riding stars. She is seen gently reprimanding her daughter for her rather messy eating habits, which Fingal claim come from him. Arran was instrumental in building a dam to keep back a mudslide.
Later she, among with Padra, Crispin and Urchin heared Juniper's story about his father and agreed that it's doesn't matter who Juniper's father is. When Linty tried to leave Mistmantle Island, Arran made an attempt to talk to her and persuade Linty that there's no danger for Catkin, but the mad squirrel didn't believed to her.
She also appears in the Chamber of Candles to check on Swanfeather, Tide, and Urchin. When she finds out about Urchin's injuries, she is very worried.
Arran is also seen fighting bravely in the raven war. She is also seen fighting alongside Padra and Fingal.
When Sepia's choir is singing she is starting to cry.
When Brother Fir dies, she is the last animal seen. She is given shown to be the one who pushes Brother Fir's coffin out to the ocean.
Arran and Padra have another daughter whom they name Fionn. Arran repeatedly asks Crispin if she could resign after the trouble was over so she could spend more time with Fionn and to help support her son, Tide as he began his training to become a Priest. Crispin agrees to her request, while remarking that she'd always be treasured by Mistmantle, even though she'd hung her circlet up.
During the Rage Tide, a tree falls and badly hurts Arran's shoulder. Cedar tells her, along with her paw that was injured during the Raven War, that her shoulder will never be the same again.
- Husband: Captain Padra
- Brother-in-law: Fingal of the Floods
- Son: Tide
- Daughters: Swanfeather and Fionn
Arran, it is time for you to marry you with Padra! Huggen He will only begin to laugh. Arran
Captain Padra is Arran's husband. Everyone pressures them to get married, but she only thinks that "he will begin to laugh" and he only thinks that "she will just hit me". This is exactly what happens when Padra does ask Arran to marry him. She hits him and he laughs about it.
Brother Tide is one of the children to Arran, but he is her only son.
When he began training to become a priest, Arran asked to step down from her Captain duties in order to support him more.
Swanfeather is Arran's oldest daughter.
Fionn is Padra and Arran's youngest daughter. Arran is shown to love her very much, and asks to be relieved of her Captain duties in order to spend more time with her while Fionn was still young.
Unknown------Unknown Unknown------Unknown | Fingal of the Floods Captain Padra--------Captain Arran | Tide Swanfeather Fionn
- Arran is the only female Captain of Mistmantle to be named in the series.