He'll need to be playing a character in the same alliance. Furthermore, there's now a faction-locked campaign to consider.
In-game username: Un1korn | Happy member of the PCNA UESP guild (Resident Daggerfall Covenant enjoyer) | Main & basically only character: Crucian Vulpin, Imperial Dragonknight of the Daggerfall Covenant, and Undaunted Bulwark (I tank) | Mountain bike enjoyer and vulpine appreciator | If you know me from PCEU: No
If you are on blue and hes on yellow yall will be able to play "together". Last campain on ps4 NA saw blue and yellow team up against red for our scrolls early and often.
Today:
You can group up to do battlegrounds together whatever faction no problem. This will change soon.
To play in Cyrodiil (Locked)you must be on the same faction account wise
To play in Cyrodiil (standard) you must be on the same faction character wise. Meaning if he is EP and your main is AD, but you have an EP alt you can take the EP alt into the standard campaign. In the locked campaigns once you enter with AD you can only bring other AD alts in.
So just be in the same faction to be safe.
#FiteForYourRite Bosmer = Stealth
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|| CP 1000+ || PC/NA || GUILDS: LWH; IA; CH; XA
""All gods' creatures (you lot) are equal when covered in A1 sauce"" -- Old Bosmeri Wisdom