On Stage 7 (See Kallen Off-->Japan Route), DO NOT ATTACK LORELEI (blonde girl). Convince her with Shotaro (piloting Tetsujin 28). After defeating all other enemies in Stage 7 (See Kallen Off-->Japan Route), Lorelei will challenge Kouji to a 1-on-1 duel. It is now safe to attack her. Defeat her with Kouji (piloting Mazinger Z). If done correctly, Lorelei will run away upon defeat. She will then join you later, on Stage 32 (Earth Route). (NOTE: Even if you satisfied the conditions for her recruitment, she will not join you unless you take the Earth Route after Stage 31. If you want Lorelei in your party, you have to give up Anew.)