This fic has a fairly interesting idea: what if Nia had an elder brother who's more than devoted
to continue his father's legacy and who shows up pre-Time Skip
? Ribo Soma Teppelin is more than a Dragon Their Feet
: he fully knows about the capabilities of Spiral Power and went on to engineer a race of Transhuman Aliens
, every single of which
can fully count as Simon's Evil Counterpart
. Add in the fact that he has superior numbers
and the Dai-Gurren Brigade is in deep shit.