Shinsei has the additional cost, "Bow 5 of your cards" to enter play.
You may ignore the cost of bowing Shinsei for Kiho actions he performs.
Reaction:
When paying for a Thunder Personality, bow Shinsei: Reduce the Personality's Gold Cost to 1 until it is paid.
Battle/Open:
Even if Shinsei is bowed, target a Kami Personality: Bow him.