According to LES ENFANTS TERRIBLES, the original lineup includes musicians who were previously in SIEGFRIED (ジークフリート), FRENCH (フレンチ), and Ba-Rra. This seemingly points to SEXY ROSE HARRY, TERRY ROSE, and NORIHIKO, but details are unconfirmed.

Some sources say that TERRY was in a band called ジークフリード, and others say that HARRY was in such a band. The only known SIEGFRIED does not appear to have featured either musician, unless they went under a different name.

Additionally, the former band mentioned in LES ENFANTS TERRIBLES is listed as ジークフリート (note the slightly different ending katakana). DEAD WIRE guitarist JIMI is said to have been in a band called ジーク・フリート, but nothing about that band is known.

So, it's not clear which Sighs of Love Potion member was in ジークフリート, nor which band ジークフリート actually refers to.

Similarly, some sources say that TERRY was in FRENCH, but other sources do not mention him (but nor do they mention HARRY). Details are unclear.