Fleur

Fleur is a bit of an enigma. She goes around helping different hunters for seemingly no reason and with seemingly nothing to gain from her actions. Rumor has it that Fleur is actually older than she makes herself out to be.

Siren's Makeup
A transmutation ability dabbling in the specialization category that allows Fleur to imitate someone else down to smallest detail, ranging from physical features and timbre of voice to Nen. The condition for activation is that Fleur must have a biological sample of the person she will be imitating, such as a piece of hair or skin.

Life Is Fleeting
A super-powered form of Zetsu granted by the specialization category that allows Fleur to fade in and out of existence for short periods of time. This means that in the moments this ability is activated, the entirety of Fleur’s existence is temporarily erased – her body becomes ethereal (which leaves her unable to interact with the physical world), and memories concerning her are wiped from everyone’s consciousness. Though it does not have a lot of applications in combat situations, defensively, it is used by Fleur to bypass attacks. Fleur cannot keep this ability activated for too long or its effects will turn permanent; at most, she can maintain it for half an hour at a time before bad things start happening.

Rewrite
This specialization ability—possessing some sentience of its own—was born from Fleur’s desire to “rewrite” and warp her own reality; through this ability, Fleur is able to do just that. One immediate limitation of this ability is that it is only able to affect Fleur. Any attempts to affect realities not exclusively related to Fleur will cause this ability to “lock” itself away, preventing Fleur from using it until it chooses to return. The downtime of this ability as a result of improper use can vary from weeks to a year, so Fleur makes doubly sure to handle it the way it was intended. This ability also consumes a lot of aura, so it is not something that Fleur can abuse; in fact, just using it six times (six for each letter in the word “rewrite") completely drains Fleur of her aura. As a payoff, however, the things that Fleur is able to do with the ability are numerous. For example, if she were ever gravely injured, Fleur could just use her ability to “rewrite” herself back to full health. On a daily basis, six times is the maximum amount that Fleur is able to use this ability; trying to use it an extra time even if she has the aura for it will cause it to enter "shutdown mode."