Given that she is from China, her real name may really be Ma Ling
As for 491, I think better enjoy while you can. The coffeshop was set up for fast turnover of customers. They don't even have a Tze Char stall as a result. With the sudden fame of this lady, many customers are sitting there for long hours drinking beer and requesting for wefie with her. Families are beginning to avoid this coffeeshop and some stalls are suffering a drop in sales. On some nights, the other Hollandia girl is a skinny middle aged PRC who just focus on topping up drinks. This PRC probably doesn't get to sell drinks and earn commission.
If you see a fat young Chinese girl with specs at the drinks counter, try her coffee. She is good at making coffee.