No public IJR answers mention Lua yet. As people ask about it and share their answers, they'll appear here.
Overview
In Roman mythology, Lua was a goddess to whom soldiers sacrificed captured weapons of enemy combatants. She is sometimes referred to as "Lua Mater" or "Lua Saturni", the latter of which makes her a consort of Saturn. It may be that Lua was merely an alternative name for Ops.
References
Roman goddesses
War goddesses