I'm on your side.
Anata o shijishimasu.
you (referring to someone of equal or lower status); dear (what a wife calls a husband)
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
support; holding up; propping; support; backing; endorsing