Looking forward to more photos as the plant grows!
Now that I'm home and can research more easily, I'm leaning toward Justicia spicigera.
From what I can tell:
> 'Sidicaro' has large, wide, bullate leaves, tips tend to be rather blunt. flower clusters are dense and tightly held. The flower clusters are beautiful, but the shrub overall is rather coarse in appearance.
> Leaves of Justicia spicigera tend to be long and narrow with an acute point. The medium-texture shrub tends to be fuller and more attractive when not in bloom. Flower clusters are numerous but are more sparse and more loosely held. I have noticed the lower lip of the bloom also tends to curl under tightly on this species.
> The similar Justicia leonardii has smaller leaves that are somewhat fuzzy.
At best it's a confusing mess, with many photos on the internet clearly misidentified.
Regardless which you have, give it adequate moisture, plenty of bright morning sun, and shade it from the hot afternoon sun and you will have a great-looking shrub on your hands.
Don't forget to post more pictures as your plant develops (adding to this thread is ideal, as your post will automatically pop up on my profile so I won't miss it).
Are you located in Costa Rica, the States, or where?