I have spent nearly all the extra time I have had during this day to research the Tchuukthai, I must say that they are an interesting race and that Thon is an interesting Jedi Master. However I have found nothing that would show that they were ‘lightsaber resistant’ so I am reluctant to allow such a thing here. That said I will go ahead and Vote to Deny that particular part of the request. However, if I understand the rest of your request to be simply that your Character has something of a companion and that said companion be ‘Force Sensitive’ then I can hardly do other than vote to Approve.
Thus:
Lightsaber resistance;
Vote: Deny
Force Sensitivity in NPC character;
Vote: Approve