The Leo symbol does make sense, seeing that there are a number of Gatekeepers. Statues, pictures, carvings of lions are often placed in front of shrines, temples, places of holiness or of utmost importance, especially relevant centuries ago across Europe and all over Japan. Lions (Gatekeepers) are the guardians, the ones that determine whether one is worthy enough to “enter.”
As for the symbol that looks like a 2, or even the second circle, it could signify the second lion (Gatekeeper) in front of said shrine, temple, etc. In Japan, there are always two, one on each side of the road that are unified in their shared goal of protecting and guarding the one road that passes them.
Just a theory! Just adding some more mysticism to the experience =]
