In the Wholecake island arc, Reiju was able to suck out poison from Luffy's body. How come? Wasn't Impel Down's Magellan the one who ate the Poison-Poison fruit? So what are Reiju's powers?
Till now(manga chapter 883) we don't know about the devil fruit that Reiju ate, but as described in one piece wika
Possibly resulting from her genetic enhancements, Reiju wields considerable poison-based powers, which garnered her the epithet of "Poison Pink."She can suck poison out of people via mouth-to-mouth and ingest it, while having exhibited immense immunity to the most virulent of poisons, such as extremely lethal doses of the poison from an Armored Stonefish's skin, as shown when she saved Luffy.
Reiju is also capable of secreting poison from her body and combining it with physical attacks.
That may be the reason why Reiju was able to suck out poison from Luffy's body and had no effect on her body.