Aunt Ella, as she was fondly known to her many devoted friends around the world, was one of that rapidly diminishing treasure of precious souls who have entered the presence of 'Abdu'l-Baha, and who are possessed of that unique quality of spirit known only among those who were touched by the magic wand of that Divine Alchemist. Hers was an enchanting spirit of exquisite grace, whose gentleness, warmth and generosity were showered continuously on all peoples. She radiated all the days of her life the virtues of the true maid-servant of Baha.
She was one of that handful of early Baha’is in the United States who implanted the banner of Baha’u’llah in that land, and who nurtured it and protected it with the iron strength of their consecrated spirit.
In a Tablet to one of the friends 'Abdu'l- Baha wrote of the services of Mrs. Cooper and her mother, Mrs. Goodall:
"Thou hadst written concerning the services of Mrs. Goodall and Mrs. Cooper. These two dear maid-servants of God are truly two shining candles, and in character are unique and matchless. They sacrifice their lives in the pathway of God under conditions of hardship and trouble and are filled with spirituality and good cheer. It is certain that the divine confirmations will encircle them."
Shoghi Effendi's cablegram at the time of her passing has defined her life-long service to her beloved Faith:
"Deeply grieved sudden passing herald Covenant Ella Cooper, dearly loved handmaid 'Abdu'l-Baha, greatly trusted by Him. Her devoted services during concluding years Heroic Age and also Formative Age Faith unforgettable. Assure relatives, friends, deepest sympathy loss. Praying progress soul in Abha Kingdom."