In Jain context, Halukarmi jeev means a light-minded, soft-karmic soul — a jīva whose karmic burden is comparatively less, whose inner disposition is gentle, and who is more easily influenced by dharma, updesh, and self-purification. Such a soul is considered sulabhabodhi in spirit: it can understand and accept right teaching more quickly than a very “hard-karmic” being. ( jainqq.org)

In simple words, a halukarmi jīva is one:

• whose karma is comparatively lighter,
• who has less obstruction from intense delusion,
• and who is more receptive to spiritual progress. ( mokshasadhana.blogspot.com)

So, halukarmi is the opposite of jadkarmi / kathor-karmi — a soul with heavier, more rigid karmic bondage. ( mokshasadhana.blogspot.com)

If you want, I can also explain this in Gujarati or Hindi in even simpler words.