Gustave has taken it upon himself to observe Marion and Sanglain following the death of the Princess and DT.   But KT thinks Gustave is in the city of Marquesas for other reasons. 
I proposed this action
 to Erec-sama myself
Yo mismo propuse este curso 
de acción a Erec-sama
Yo mismo propuse este curso 
de acción a Erec-sama
Propus esta ação para o Erec-sama