The 22-year-old has been bailed to face Ringwood Magistrates’ Court next year charged with stealing a car last week and possessing proceeds of crime.
Police don’t expect to lay any more charges against any of the family of five, whose panicked departure on a road trip to NSW last Monday sparked a missing persons investigation.
Police had also charged Ella’s sister, Riana, 29, with stealing a car last week, but those charges have been since dismissed under a NSW mental health act.
Riana was found “catatonic” in the back of a ute last week and taken to hospital in NSW, where she remains on Monday.
Ella and her brother Mitchell gave a press conference at their Silvan home on Sunday, telling reporters they were still confused about what sparked the road trip with their father Mark Tromp, their mother Jacoba and Riana.
By Tuesday, all three adult children abandoned their parents and authorities were called in to investigate, finding the Silvan home unlocked and phones and credit cards left behind.
Mitchell, who made his own way to Melbourne from Bathurst, told reporters on Sunday that getting out last Tuesday “was the best idea at the time”.
Riana and Ella left their parents near Jenolan Caves and headed to Goulburn.
There the sisters split up.
Ella returned to Melbourne, and was later charged by police with car theft.
Mrs Tromp was found on Thursday in Yass Hospital in an emotionally poor state as police continued to search for her husband.
He was found unharmed in Wangaratta on Saturday.
Mrs Tromp has since been transferred to Goulburn Hospital, where she remained with Riana on Monday.
On Sunday in Silvan, Mitchell and Ella were unable to explain what happened on the trip.
Mitchell said “possible things” might have led to the departure..
But he wouldn’t comment on whether a family dispute or mental health issues were the trigger.