Eldrene ay Ellan ay Carlan (translated from the Old Tongue as Eldrene daughter of Ellan daughter of Carlan) was the wife of King Aemon al Caar al Thorin and the last queen of lost Manetheren. She was an Aes Sedai of exceptional strength with the power in an era when most channelers were considered strong. She was a beloved figurehead of her people who named her Ellisande which translates from the Old Tongue as "The Rose of the Sun". 
Historians relate that Eldrene possessed a great beauty. Her hair was alike to spun gold and any man who gazed upon her was easily smitten. It was said that wherever she went, flowers bloomed at her feet to make her smile.  So revered was she that soldiers of Manetheren frequently invoked her name in battle as a rallying cry.
Records regarding the rivalry between Tetsuan and Eldrene are scant. Anyway it is known that Tetsuan would have praised herself to be the second strongest Aes Sedai ever, since the time of Caraighan Maconar, untll the arrive of Eldrene who pushed Tetsuan to the third place. Because in TWoTC Caraighan is described at level 3(+10) it can be guessed that Eldrene was at 4(+9) and Tetsuan at 5(+8).
Many of the histories of Eldrene's era were destroyed in the upheavals brought about by the Trolloc Wars. As such, several details of her life have been lost to time and legend. What is known is that Eldrene was born in Manetheren circa 950 AB and was noted for being exceptionally strong in the One Power. She was sent to the White Tower to become a novice and there became acquainted with Tetsuan, another novice of great strength. White Tower records relate that Eldrene and Tetsuan quickly became rivals and that Tetsuan ultimately developed a lasting adolescent jealousy of Eldrene who was more beautiful and stronger in the Power. Both became full Aes Sedai sisters circa 1000 AB. Historians do not know for certain which Ajah Eldrene chose, though it has been speculated that she became a Red. It was also during this time that the Trolloc Wars began and it is believed that Eldrene returned to her homeland to support her people while Tetsuan remained in the White Tower. Tetsuan is believed to have also somehow caused the marriage between Eldrene and Aemon, both for political reasons and to keep away her rival from the White Tower. Nonetheless the marriage between the two was happy and they fell in love to each other.
There is no history that survives the Trolloc Wars to relate Eldrene's activities as a full Aes Sedai sister. What is known is that sometime around 1175 AB she married King Aemon al Caar al Thorin and bonded him as a Warder. She thus became the queen of Manetheren at a time when the entire world was at war against the Shadow and she ruled from her country's wondrous capital city, high and secure in the cloud-capped peaks of the Mountains of Mist. Her nation was known to have always been at the forefront of the fighting and it was said that people of other nations referred to Manetheren as "a thorn to the Dark One's foot and a bramble to his hand".
Eventually the threat posed by Manetheren required the shadow to focus a large amount of resources towards its extermination. Sometime around 1200 AB Aemon was baited into overextending his military which allowed the shadow to strike at the Manetheren heartland. When the shadow's plans became known to Aemon, he recalled his forces from the Field of Bekkar - site of Manetheren's most recent victory - and back to the Manetheren heartland where they engaged their enemy in a titanic multiple-day struggle that came to be known as the Battle of the Tarendrelle River. Knowing that he could not win the battle unaided, Aemon sent messengers carrying a plea for aid to all the allied powers of the Ten Nations and a special messenger was sent to Eldrene's former rival Tetsuan who had since been elevated to the Amyrlin Seat.
Histories relate that when Tetsuan received Aemon's messenger, she was influenced by her childhood hatred of Eldrene and thus worked in secret to misdirect or delay responses from allied nations. As a consequence, Aemon's army was unable to halt the advance of the shadow into the Manetheren heartland and he ordered an evacuation of all civilians. It is said that Eldrene supervised the effort to preserve her nation's culture and helped thousands flee into nearby forests and mountains;  though it is also said that thousands more refused their king's order to flee and instead marched to join Aemon's failing army and pay the price of their homeland with their blood.
Manetheren's doom was sealed when Aemon's army was driven back to a crossroads which is now known as the intersection of the North Road, the Old Road, and the Quarry Road. In a final desperate last stand, Aemon and his army were overpowered in a one day battle that came to be known as the Battle of Aemon's Field. The moment Aemon perished Eldrene felt the severing of the bond with her beloved husband. Alone in the evacuated capital city she became consumed by grief and thus she began to draw upon the True Source through a powerful sa'angreal.
With her exceptional channeling ability further augmented by the ancient artefact she hurled immense volumes of the Power at the Shadow's remaining army. In a display reminiscent of the Breaking of the World, Eldrene destroyed the majority of the Shadow's forces and scattered those few that survived. However the price paid for this pyrrhic victory was immense when Eldrene perished - consumed by vast amounts of the Power - and the legendary capital city of Manetheren was annihilated.
In TWoTC it is stated that the explosion of power that killed Eldrene and destroyed Manetheren with the enemy army was caused by her drawing to herself more of the One Power than any human could wield safely and unaided by an angreal.
Eldrene is one of many tragic figures that emerged from the suffering of the Trolloc Wars. Due to the complete destruction of Manetheren, knowledge of her exploits are mostly known only to sages and White Tower historians, though there are three elements of geography that endure as a testament to her life:
After the destruction of Manetheren, survivors returned to repopulate the land. Those that settled in the area where the Tarendrelle River flows down from the Mountains of Mist were emotionally moved by the beauty of a well-known waterfall. The majestic Eldrene's Veil cascades for over 500 feet and for early settlers of the Free Years its beauty invoked the memory of the last queen of Manetheren.
In the village of Emond's Field there is an aquifer known as the winespring that flows from a low stone outcropping near the village green. Legend asserts that when Eldrene destroyed the Shadow's forces on the day of her husbands death, upheavals caused by her channeling forced an underground spring to burst forth upon the site of the battlefield. It is further said that the water of this spring has flowed unceasingly since the day of the battle and marks the site of the final heroic sacrifice of the Army of Manetheren. 
The Ancient Capital of ManetherenEdit
South of the Two Rivers and several thousand feet above the White River in the Mountains of Mist stands a lone Waygate surrounded by stunted trees growing in poor soil and smooth slopes of rock that shine like glass.  This is the site of the former capital of Manetheren - the mountain home itself - which remains as the last physical evidence of Eldrene's death. Travelers to this location must endure a long exhausting climb which will be rewarded with a spectacular view of the cloud-capped peaks of the mountains above and the furious turbulence of the White River below.
Beyond geography, the tragedy of Eldrene's relationship with Tetsuan is a subject taught to novices in the White Tower. Students learn that when Tetusan's treachery was made known to the Hall of the Tower the sitters voted to strip Tetsuan of her staff and stole and condemned her to be stilled. Tetsuan was subsequently forced to labor in the tower kitchens as a scullery maid and died soon afterwards.  Tetsuan's punishment serves as a grim reminder to students that no Aes Sedai sister - regardless of her position or influence - stands above Tower Law.