Head to Kyle’s house and talk to him. Go upstairs to meet his “alternate self”. You’ll have to fight Kyle’s cousin in a one-on-one battle. Keep attacking normally and try to inflict status ailments if you can. The enemy will use heal, protection, and even two turns in a row. Fortunately, this is a scripted battle and the Alternate Human Kite will eventually injure himself and end the battle immediately. You’ll also unlock the Human Kite as a combat buddy. Mission complete.