The attacking midfielder, who has scored 26 international goals in 55 appearances for South Korea, joined Chelsea on a two-year contract from World Club champions INAC Kobe Leonessa last month.
And Aluko believes the 22-year-old's creativity and technical ability will help Chelsea find the back of the net more freely next season.
"Ji is a fantastic player and I'm just really, really excited to be playing with her," Aluko told skysports.com. "I think she single-handedly controlled the game when she played against us for Leonessa in Japan.
"She's one of those players who you can give the ball to regardless of the situation on the pitch and you know she will retain the ball and keep possession.
"It's going to take her a while to get used to the physical side of the game here but she can absorb pressure really well. I think she's so good on the ball that it is really difficult for players to get near to her.
"She is going to create goals for people as well so I'm just really excited. She's a great signing for us and someone who I think is really going to help us."
Foreign duo Jackie Groenen and Emma Wilhelmsson and England quartet Laura Bassett, Rachel Williams, Gilly Flaherty and Katy Chapman have also joined Chelsea during the off-season.
And Aluko believes the players that have come in can help the club challenge for honours next season.
"Chelsea have strengthened a lot and we've brought in some great English players as well as some great foreign players," the England striker said.
"I think the target for us (next season) is to compete for trophies - the FA Cup, the Continental Cup and the league.
"Obviously the first aim will be to try and get into the top three in the league and then go from there but I think we've got a strong squad and we're capable of doing that.
"We've certainly got high expectations for ourselves and hopefully we can achieve them."