Amber Character Bio

Name: Amber.
The name itself is a temporal paradox—when Leonard first met her from his perspective, that was the name she'd introduced herself with. But when Earth One's Mick and Earth X's Leo first met from hers (vis a vis a time travel mission), Mick recognized her and called her by that name, confirming that he would know her very well at some point in her future.
(Likewise, this is why she prefers to call call Len "Leo" after meeting the Earth One version.... this and the fact that she'd met him as a child when he still went by the name of Leo.)
Where the name came from in Timelines 1.0 and 2.0 (both without Len or Leo's participation on Rip's mission, and thus without that initial meeting from her viewpoint) has never been revealed.

Sex/Gender: Ambiguous. The identities Len is most familiar with utilize a female persona according to the traditional definition of the word; she has confirmed she is quite capable of taking male and other roles, though her ability to use the physical characteristics of those roles tends to be limited. She has never confirmed whether Len has met her under any other identity.

Species: Ambiguous. Claims to pre-date the human species, but presents herself as human when working with humans. Len considers her a metahuman.

Powers: Shapeshifting: Able to rearrange her body on a cellular level to take on the forms of different species as the situation requires.
Channelling: Can transfer energy from one location or object to another. Frequently draws a small amount from one or more targets of her spellwork to aid in the casting.
Research: Has conducted research in her long life on a variety of spells from many different cultures. Extremely well-read and has a grimoire of her favorite spells and those she desires to research further.
Combined: Frequently uses her ability to channel energy as a means of offering healing magic, to fuel a spell for other mages to cast, and can and will force a shape-change on other people if the need is great enough.

Weaknesses: Channeling: Requires permission from anyone involved in the transfer of that energy, lest the participants resist the unexpected transfusion and inadvertently sabotage the process.
She informed Lisa, once, when criticized for not using her power to heal an unconscious Leonard, this limitation has no grey area—you are either a willing participant or you instinctively resist the energy transfer.
"Dubious consent" counts (nobody involved need know exactly what they’re agreeing to for it to work), implied consent... does not. Permission must be given in some form for the spell to work without further damage.
Literally every one of her powers, if and when they influence lives besides her own, depends on the ability to channel energy, meaning her ability to affect other people with her magic at all requires that consent. Naturally this means she cannot use her power to hunt demons as Constantine does (as she would technically need the demons’ permission to trap them) nor to fight the variety of enemies Teams Arrow, Flash, and the Legends have faced (likewise needing those enemies' permission). Even her ability to channel energy for healing purposes only works if the subject is in any condition to give that permission.
Magic: Well-researched and inventive at times, but in terms of magical strength she is no more powerful than most humans. Must enlist the aid of specialized mages (e.g. Constantine) for her more powerful spells (i.e. most of them).
Shapeshifting: Her most powerful ability, but also the one that requires the most power to use. The easiest way to restore that power is to acquire living energy in physical form. Once upon a time this involved drinking the blood of her prey, but this quickly got her into trouble before she learned to feed without causing lasting harm to the prey. She has since found that sexual energy, while less potent than life blood, carries far less risk to the victim, but this carries with it another risk....
For the easiest way to shapeshift, to use as little power doing so as possible, is to allow the lives around her to influence that shift, to lure in her prey by allowing that prey to choose whatever shape they find most attractive.... And some of her intended targets are not inclined to see her as a potential bedmate, or indeed as anything that could easily feed from them. Case in point, Len's first encounter with her was as a motherly type (when he was a child and most needed someone willing to look after him and Lisa), and in his latest encounter he perceived her as a child (when the thing he most needed was to be the protector he felt Lisa needed).

Timeline Shift: As most magically-inclined creatures, Amber is attuned to the world’s own energy. This makes her, among other things, sensitive to changes in the timeline. But like most such Sensitives, she is only aware of those other timelines in the “order” in which things are changed... she must rely on her grimoire of spells to give her visions of potential future events.
Timeline 1.0: What Could Have Been (pre-Reverse Flash)
Human lives are so fleeting compared to Amber’s own, and naturally, her encounter with the person who would come to be known as Captain Cold was quite brief from her own perspective.
She met the child Len and knew him and his sister as another pair of foundlings similar to the children she usually "adopted" during her lifetime. But unlike many of those foundlings, she could not involve herself too much with this pair—though their mother was absent, their father was very much alive and in control of them. Despite the man's ineptitude and frequent abuses, his very existence, and Damion Darkh's own interest in Len, prevented her from using her powers to take the two children into her keeping.
But Darkh's interest only made her more determined to protect the children, and neither he nor Lewis were able to prevent her from looking after them in a more mundane fashion. She frequently aided them in the "jobs" Lewis forced on them by pawning off stolen goods on their behalf. She continued offering this assistance even into their adult years, long after Darkh had grown bored of toying with them, and would likely have continued for longer still, but for a mishap with the Santinis that left her near death. She was forced to abandon her current persona, having power enough to help the siblings only once more—by influencing the Santinis' recent target, one Tess Morgan, to see what Len had risked by protecting the scientist, so that Tess would save him from prison before the Santinis succeeded in taking their revenge.
Len, being unconscious in Iron Heights' infirmary after just such an attempt, of course knew none of this.
Timeline 2.0: What Could Have Been (post Reverse Flash)/Alternate Universe (no Legends)
Due to Eobard Thawne's manipulation of the timeline, Doctor Henry Allen was convicted of Nora Allen's murder and sent to prison at the same time Len was incarcerated there for the recent murder of a security guard.
Len instinctively recognized Henry's innocence, and some shred of compassion his father had yet to destroy moved him to protect the older man from the other inmates.
Henry, in turn, was present when two of the Santinis' operatives attempted to kill Len while the guards turned a blind eye. Henry was unable to prevent the assault, but he kept the young man’s condition stable until the prison's medical staff arrived.
While Len recovered in the infirmary, Amber worked hard to prove that his father had framed him on the Santinis' behalf. She was ultimately successful in using the human's own legal system to free him.
But that freedom proved all too temporary. Shortly after Eobard Thawne had killed Tess Morgan and took Harrison Wells' place, Len, in an attempt to determine why the Santinis were so interested in the scientists, was caught snooping in their labs. When he proved to be sensitive to changes in the timeline, authorities sent him to Langford Institute to be treated for what they believed were severe hallucinations.
At Langford, he was kept in a drug- induced coma. When Amber enlisted the aid of the mage John Constantine to restore Len and free him again, the drugs’ effect on Len’s mental state interfered with their spellwork. Amber vanished, trapped in the timestream in a place called Jurgen's Ridge.
By the time Constantine recovered from the botched spell, Len had been transferred to none other than Arkham Asylum, there to remain for three years until Mick and Lisa managed to break him out.
Timeline 3.0: Legends of Tomorrow
Due to Len's proximity to the Oculus Wellspring, the explosion sent him directly into the timestream and fractured his history, allowing multiple timelines to bleed into each other. (See Majummed Earth One bio). The resulting temporal illness presented itself as a physical illness, in which he not only vividly remembered but also experienced the events of other timelines.
One of these other timelines—notably the "Majummed" timeline—protected him from the induced coma, but at the cost that he was unable to process the changes to his history and could not decipher which memories were true to the timeline he found himself in. He was confused, and in a near-constant state of terror, and as with Timeline 2.0, his mental state interfered with Amber and Constantine's efforts to restore him.
Unlike Timeline 2.0, the explosion of the Oculus Wellspring freed Amber from Jurgen's Ridge, allowing her to return to the timeline proper where she worked to minimize the damage Len suffered from these changes.
Timeline 4.0: Legion of Doom
The “hallucinations” Len suffered due to Lisa’s murder and subsequent erasure from history at the Legion’s hands sent him to the Institute at a far earlier date than had happened in the other timelines.
Given Lisa’s absence, Amber’s ability to restore Len was even more restricted, and she recruited Mick Rory to assist in the spellcasting. The man’s loyalty and strength were sufficient to overcome the limitations the mages had found in previous timelines… but Eobard Thawne’s intervention guaranteed that the spell would go wrong once again.