I like to think that it's because Touhou characters actually experience their reality as bullet hell shooters, and as such Tenshi actually spends most of her time staring at her own back.
That's great news. Let's keep low for now.There appears to be two identical pairs.*chitter*
Katakana here is iesu, anyone who can translate bug-speak please go ahead.Ah!Wah-------!!There's my double!!Roger that!It seems that other contestants have already noticed it, so here's an updateThat hair and back...
Now why Tenshi can recognise herself from the back is something you guys can think about. My guess is extreme narcissismA pair turned up from somewhere and are wearing disguises of us.Eh!?What the hell was that!?It appears that for some unknown reason, there are TWO Erin & Tenshi pairs! From our vantage point, we are unable to discern which pair is the fake!There are doubles of us on this field.Eh!?Let's chase after them!