She is not my mother, she’s just a chaperone.
The kanji means solely, and this means solely, but also other related things like only or merely. They're all pretty close, so try to remember a few!
To spice up something you'd describe with words like only and simply use Ta da! (ただ) to spice it up. It's like magic! Now it isn't just a gift, it's a TA DA surprise gift.