Kammala jumla mai zuwa: Arcanjo ta inganta sosai lokacin da ta dawo aiki a cikin 2012, ta kafa jerin abubuwan da suka fi dacewa a kan hanyar Brazil. Ta share goma sha takwas mita a karon farko a
2012 Gasar Ibero-American a Wasannin motsa jiki, inda ta lashe harbi da aka jefa tare da mafi kyawun mutum na mita 18.84. Bayan lashe taken ta na farko na Brazil, an zaɓe ta don ƙungiyar Brazil don wasannin Olympics na London na 2012. Ta jefa mita 19.02 a wasan karshe na Olympics ya isa na bakwai. Ta ƙare lokacinta tare da nasara a gasar zakarun Turai ta 2012 ta Kudancin Amurka a karkashin 23 a Wasannin Wasanni.