SYXE (サイクス) forms.
Bafflingly, this band seems to have had two bassists named DEAN...? Or there were two bands named SYXE with bassists named DEAN active at the same time...?
One of them, Miwa Tatsuya (三輪 達也) a.k.a. DEAN of AION, was confirmed by AION leader IZUMI to have been in SYXE in 1985 and 1986.
The other, Fukui Toshihiro (福井 俊博) a.k.a. Tammy a.k.a. Ryoh☆彡 of 999-three nine-, confirmed via his twitter profile that he was in this band with the name DEAN.
Drummer KIRITA is said to have been a member after his time with AION. It's unclear, though, if he's the same person as SHIN or KID, or if he was a member at a different time.
V. RUDY / G. HACO / B. DEAN (Miwa Tatsuya (三輪達也)) / D. SHIN
V. RUDY / G. HACO / B. DEAN (Miwa Tatsuya (三輪達也)) / D. KID