Ventus

Ventus (ヴェントゥス, Ventusu), commonly nicknamed "Ven" (ヴェン), is one of the three playable characters of Birth by Sleep who is later revealed to be a member of the Dandelions who survived the Keyblade War before being displaced from his time by Xehanort. Throughout the plot of Birth by Sleep, Xehanort intended Ventus to recreate χ-blade for his agenda. After Ventus sacrifices his heart to prevent the χ-blade's completion, his comatose body is sealed within Castle Oblivion while his heart takes refuge within Sora's, which factors into the physical appearance of Roxas.[26] In Kingdom Hearts III, Sora becomes aware of Ventus's heart within him and uses the power of waking to send it back to his body, reviving him. Ventus later aids Sora and his allies in the final battle with Xehanort.