hmmmm....if you want my advice as what i did with Lulu, you can try and Create Events.
since i started Lulu, i sort of made her more...involved with alot of different RP areas such as Morgana's bakery and The Sparring Grounds to name a few. i also created a bunch of conflicts with other characters that usually leads up to interesting things. Im sure Tristana, Morgana, Udyr, Fizz, Talon, Fiora, and other people im to lazy to list down.
if i were to make a suggestion, i would say that you should make some conflicts with Heimerdinger, cause some verbal, and perhaps some physical, conflicts between the two :3