How do I unlock rank 4 parts for the Hyaku Shiki?
Clear the fourth and fifth missions in OYW Char Aznable’s Official Mode (Re-entry to Earth and Winds of Jaburo) on any difficulty and keep all allied pilots alive in both missions. The key to meeting this requirement is to rescue Emma Sheen ASAP during Re-entry to Earth — she will retreat if her MS takes any appreciable damage, and that will torpedo your efforts (as she will count as an ally not saved for this mission and won’t even appear in Winds of Jaburo).
