"North American anime licensor Sentai Filmworks announced on Tuesday that its upcoming Blu-ray Disc release of the Persona 4 The Animation television anime series will include an English language dub but will not include the original Japanese language track. The company noted that the Japanese licensor required the change. The DVD release will still contain both English and Japanese audio tracks, and it will also include Japanese episode commentaries." -- Source: Anime News Network
Ken and Akihiko are in the show (although, they could be named John and Robert since it really doesn't matter) and there is a reference to Mitsuru.
That sounds more like Trinity Souls is a spin-off to me. I'll have to get around to watch the series until the end soon.