Why the hell am I here?

"what is this BABY doing in space!???"

A particularly pessimistic and irritating Eridian is pontificating to the others, insisting on the highest degree of caution when interacting with the alien in any way, even if that comes at the sacrifice of speed in treating the alien's ailments. Rocky is furious at the implication of "even if that comes at the sacrifice of the alien, period", but silent, unwilling to express his counterargument at full volume and risk waking Grace. Still, he is almost vibrating with anger where he sits on the makeshift 'human-style' bed beside his friend.

"This creature moves about even when supposedly at rest! It's unnatural! Perhaps Rocky-hero only survived the journey here at all because he was safely on the other side of a barrier of xenonite and ammonia, out of this creature's reach. Who knows what violent urges and instincts are contained within that bizarre body?"

The collective attention of the gathered Eridians shifts to focus in on Grace's slumbering form.

As if on cue, Grace rolls onto his side, still snoozing away, and cuddles his whole body in a curve around Rocky's, in a shockingly-close mimicry of a parent [Eridian-cat-equivalent] curling around its [Eridian-kitten-equivalent].

Until Grace slips out a sentence along the lines of "could you give me a little grace here" and Rocky immediately points out he used a word wrong so Grace has to explain that yeah, grace means elegance but it can also mean mercy sometimes too.

Grace was put into coma by the people who cared about him. They (especially Yáo being Yáo) probably double-triple-quadruple checked everything. They watched him sleep for those first few days — I doubt they went into coma immediately after leaving Earth's orbit. They probably talked to him, assuring him that he'll be okay.

Ilyukhina's coma procedure was probably supervised by Yáo. He made sure that everything was in order, but — he is just one man and he is not a doctor. There was much more room for mistakes.

When Yáo went to sleep, he was alone. He had to rely on the technology completely.