Meghan Markle reportedly made secret visits to the Grenfell Tower site to console victims of the tragedy
The US actress arrived without Harry but was accompanied by royal officers to keep her safe.
'Meghan's visits mean so much to us. She has a special place in our hearts,' A leading Grenfell community member told the Mirror.
A royal source said Ms Markle had 'regularly' been visiting the organisations - echoing the charitable work of her fiance's late mother, Princess Diana.
A spokesman for Kensington Palace told MailOnline: 'Meghan has been regularly making private visits to organisations as she gets to know the UK charity sector.'
The June 14 blaze killed 71 people and tore apart an entire community
The royal brothers also met therapists and the Grenfell Women's Group, which has played a massive part in the relief effort.
This comes as Meghan and Prince Harry get set for a royal walkabout to meet the people of Edinburgh when they begin their official visit to Scotland today.
In the shadow of the city's world famous castle, crowds are expected to gather on the esplanade today to meet the prince and his fiancee as they greet well-wishers.
The trip to Scotland will be the fourth public appearance Ms Markle and Harry have made together and follows successful visits to Nottingham, Brixton in south London and Cardiff in the months that followed their engagement announcement in November.
Also on the esplande will be the Royal Marines Band Scotland who will play for Ms Markle, the former Suits actress, and the Prince who became Captain General of the Royal Marines in December 2017.
The couple will then move on to the New Town to visit Social Bite, a social enterprise cafe which distributes 100,000 items of food and hot drinks to homeless people across Scotland each year, as well as employing staff who have experienced homelessness themselves.
Hollywood star Leonardo DiCaprio stopped for lunch at Social Bite venture Home in Edinburgh's west end in November 2016 while the Duchess of Cornwall and George Clooney have been to Social Bite's Rose Street branch.
Prince Harry and Ms Markle will round off their visit by attending a reception at the Palace of Holyroodhouse to celebrate youth achievements marking Scotland's Year of Young People 2018, an initiative that aims to inspire Scotland through its young people.