Arc System Works gives a nod to their other fighting games in Persona 4: The Arena. A forum member on Dustloop discovered, the arcade version has alternate character colors based on BlazBlue and Guilty Gear characters.
Yu Narukami / Persona 3’s protagonist
Yu Narukami / Ky Kiske from Guilty Gear
Yu Narukami / Ragna the Bloodedge from BlazBlue
Yosuke / Jin Kisaragi from BlazBlue
Yukiko / Carl from BlazBlue
Chie / Makoto Nanaya from BlazBlue
Teddie / Faust from Guilty Gear
Kanji / Tager from BlazBlue
Naoto / Hazama from BlazBlue
Aigis / Nu-13 from BlazBlue
Akihiko / Bang Shishigami from BlazBlue
Mitsuru / Litichi
After picking a color you can select whether to wear glasses or not. The Persona 3 characters have shades and Aigis has a visor. I think bandit Teddie is my favorite, though.