Danbooru-based image board with a specialization in high-quality images.
aoki_hagane_no_arpeggio chihaya_gunzou haruna_(aoki_hagane_no_arpeggio) i-401 iona kirishima_(aoki_hagane_no_arpeggio) kongou_(aoki_hagane_no_arpeggio) maya_(aoki_hagane_no_arpeggio) mecha profile_page takao_(aoki_hagane_no_arpeggio) uniform wakaba

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Iona is Index's lost twin sister LOL!
Kinda like their interpretation of Iona.
PPV10 said:
Iona is Index's lost twin sister LOL!
If so, Index should be the one getting lost