David Ngo Jennifer Ngo, who has scoliosis, has struggled with her mental health for years Her brother, David, started cleaning her room as a teenager David tells PEOPLE that his sister's room is "a reflection" of her mind, and that cleaning the space is a way he shows love for his sibling When Jennifer Ngo's room gets so cluttered her brother, David, can barely see the floor, that's when he knows she's struggling with the weight of everything she can't say out loud. Without needing to be asked, the 21-year-old shows up with a trash bag in hand, prepared to sort through and tidy up his sister's "depression room." It's not about the cleaning, but about reminding his older sibling that she is not alone. Amid the piles of clothes and emotion, he's there, ready to help her sift through it all. "I think it's important to clean out her room every so often because I feel like a room is a reflection of the mind," David tells PEOPLE exclusively. "So I understand when her living conditions aren't the best she's struggling in other aspects of life." Never miss a story — sign up forPEOPLE's free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories. The brother-sister duo are well-known content creators, beloved for their hilarious videos where they try quirky and unexpected foods together. "Me and my sister weren't the closest growing up but got close as we got older," David explains. "We seemed to bond through our rough childhood and humor." David Ngo While David has over 3.4 million followers on TikTok, Jennifer has over 9 million across her social media profiles. "She was my inspiration in getting into social media," he reveals. "She's a very caring person and goes above and beyond for the ones she loves." In a heartfelt attempt to show her just how much she means to him, David has been cleaning Jennifer's room for nearly seven years. "She's the strongest person I know," David says of his 27-year-old sister, who was diagnosed with scoliosis and has only one lung and kidney. "From a younger brother's perspective, it's extremely upsetting sometimes because I don't want my sister sleeping and breathing in these conditions as the room gets very dusty, which makes me concerned for her health," he says. "She has not only one lung but an extremely weak immune system." David Ngo Although he admits it's sometimes easy for him to feel frustrated and mistake her struggle for laziness, especially since he's never experienced what she is going through, he is learning more about mental health every day. "I now understand that sometimes when people are struggling with depression, it's not them being lazy or just simply sad, but it can be about the person just trying to stay afloat and get through the day," he explains. Understanding how draining it can be, he's proud when Jennifer manages the basics, like brushing her teeth or eating a proper meal. He never minds stepping in to help when needed, Even though affection doesn't come easily between the two, they find other ways to show their appreciation for each other. "We don't ever hug or say I love you, but we show love in other aspects, whether it's attention to detail or acts of service," he shares. Apart from just making videos together, the siblings value spending time just the two of them. "Whether it's going out to eat or going to the mall to window shop, or our late-night Target runs – I try my best to be patient with her and make her feel seen and heard," David tells PEOPLE. "I also often pay attention to detail and try to make her feel appreciated by buying her surprise gifts." David Ngo Over time, David has learned to shift his perspective and approach depression with deeper empathy and understanding. When asked what advice he would give to others looking to help their siblings through tough times, he says it is vital to be as compassionate and supportive as possible. "It's more than just being sad. Depression can be debilitating. A simple task can seem like the hardest thing to accomplish. I'd much rather be cleaning a room to help my sister out than to see her fall into a deeper hole," he says. "Love does not always have to be shown through words, it can be actions." If you or someone you know needs mental health help, text "STRENGTH" to the Crisis Text Line at 741-741 to be connected to a certified crisis counselor. Read the original article onPeople