"Ch... Chara?"Flowey is a character from Swaptale. He is the reincarnation of Asriel Dreemurr, the son of Asgore and Toriel and the adoptive brother of Chara.
– Flowey recognizing Chara.
Flowey attempts to urge Frisk into killing him after being defeated and losing the Human SOULS. He is surprised when "Frisk" calls him by his real name, and then realizes that it's actually Chara.
At first, Flowey is glad to see his former friend, but then he becomes terrified and confused when Chara shouts at him, demanding to know where Sans is and accusing him of messing with the timeline.
Calling Flowey useless, Chara prepares to attack him, but Flowey quickly runs away.
Flowey's appearance is identical to how he appeared in Undertale.
Although his personality is mostly identical to how he behaved in the Neutral Route, he does behave similarly to his Genocide counterpart when confronted by Chara.
Upon realizing that he was talking to Chara, Flowey tried to act friendly to them. But Chara's aggressive behavior made Flowey quickly change his mind and he was forced to flee for his life from his former best friend.