Recruited from Huawei PS United during the transfer period, the 26-year-old forward added a tonic in attack in the absence of Michael Foster.
Foster has moved to Lae City Dwellers to boost their NSL campaign and prepare for the OFC Champions League in New Zealand later this year.
Ronny is from Buang (Morobe) and Karkar Island (Madang) but was adopted by a family from Rambyutso Island, Manus.
He said he was happy to lead the boys in the midfield and provide some much-needed support for his strikers Patrick Aisa and Pettyshen Elijah.
Ronny has been journeyman in the NSL, playing for four different clubs before ending up with Rapatona.
He said he started playing in the NSL with Petro Souths (2011/12), before signing with Welgris Highlander (2012/13), Lae FC (2013/14) and Oro FC (2014/15).
Rapatona coach Max Foster said Ronny had been the best buy for the club, pointing out that he had blended in well with his new teammates.
For Erema the match was a disappointing result.