TLDR:
Victorinox Signature Lite - small, lightweight, very handy & useful, doesn't scare the timid
Spyderco Delica with half-serrated blade - tough & durable, easy to carry, easy to open and shut. (FWIW, I do not like the liner locks)
Long version:
I carry two. For about 20 years I've been carrying a small Victorinox Signature Lite on my keychain. It has a very nice (and small) blade, scissors (which I rarely use), a nail file with a flat-tip screwdriver on the end, a little LED flashlight, and an ink pen (both of which I use often). It has been very useful. Some of my relatives, both men and women, have seen it and now have their own.
I've also carried a Spyderco Delica since about 1990, so 35 years or so. I lost the first one around 20-25 years ago so this is my second one. When I got my first Delica I decided to really abuse it and test it out.
I cut down several big, thick multi-ply cardboard boxes (150hp outboard engines shipped in them). It was a chore due to the knife's small size but it cut all of them up. I didn't sharpen it and the next week I butchered a muledeer with it. Gutted it (including breaking open the pelvis by using the serrated edge AND pounding the knife through with a ROCK), skinned it and butchered it with that knife. The knife needed sharpened (touched up) about half way through the butchering job. BTW, I haven't abused my second one as hard but it still gets hard use. I love my Spyderco.