Of course there might be no intelligence life in one of those planets but if there are, here's what they might look like;
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Meet Decapoda Sapien (meaning "Wise 10 feet") is a intelligent being (either civilized or not) of one of Trappist1's planets
As the name suggests it, it has 10 limbs which doesn't included the tentacles under it's beak-like month
It has 6 eyes but in the drawing, it only shows it's 4 eyes
Those beings and other life forms might be Cephalopod-like creatures but this is just a theory tho
Now that's all the theory to offer and tell me what they might look like from your perspective (and not humanoids because that's both less likely and possibly to exist)