Connection between Wren from PSIII and PSIV?

[Omega-z]

@Zorafim - It's true that the names are different but so is Noah (PSI) to Lutz (PSII & PSIV) and there the same person, So its the same. Wren's name may not of been able to fit into the spacing for the JP version of PSIII at the time or it was a goof up (since he introduces himself as 386 and not Sierren in the JP version) and JP ran with the name Sierren until they could change it, They did add the early art work for PSIII of the name Sierren before the changed it in a PSO hunter guide book too (there was an earlier idea Sega had before PSO's story was created was to have Wren/Sierren with Alisa III in PSO, but it didn't work out). Also the PSIII EN version, PSIV JP version (Forren = Wren), PSIV EN version has it as Wren, Then you have The remake with "Type 386". Also there was (same time as the Spec's) PSIII comics with the name Forren and not Sierren. Also you have in-game links to them being the same.

It's up to you if you believe it or not.