Tokusou Sentai Dekaranger

Three unidentified objects have landed in Japan. Upon investigation, they escape. An object is found near the crime scene, which had an audio recording on it, with a plan to take over Earth. Luckily, the Dekarangers are on the case, fighting their first Alienizer, Moyeda. But, Ban isn't accepted by the others are a leader nor member. Will they ever? Also, what's Ban's will to fight? Does he have any?